Merge pull request #190 from oca-sorrento/add_account_tax_balance

Add account_tax_balance

account_tax_balance/README.rst

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+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+   :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+   :alt: License: AGPL-3
+
+============
+Tax Balances
+============
+
+This module allows to compute tax balances within a certain date range.
+It depends on date_range module and exposes 'compute' methods that can be called by other modules (like localization ones)
+
+Usage
+=====
+
+Accounting --> Reporting --> Taxes Balance
+
+Select the company, the date range, the target moves and 'open taxes'
+
+.. figure:: /account_tax_balance/static/description/tax_balance.png
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+   :alt: Try me on Runbot
+   :target: https://runbot.odoo-community.org/runbot/91/9.0
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/OCA/account-financial-reporting/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smashing it by providing a detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* Odoo Community Association: `Icon <https://github.com/OCA/maintainer-tools/blob/master/template/module/static/description/icon.svg>`_.
+
+Contributors
+------------
+
+* Lorenzo Battistini <lorenzo.battistini@agilebg.com>
+* Giovanni Capalbo <giovanni@therp.nl>
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+To contribute to this module, please visit https://odoo-community.org.

account_tax_balance/__init__.py

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+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import models
+from . import wizard

account_tax_balance/__openerp__.py

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+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# © 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+{
+    "name": "Tax Balance",
+    "summary": "Compute tax balances based on date range",
+    "version": "9.0.1.0.0",
+    "category": "Accounting & Finance",
+    "website": "https://www.agilebg.com/",
+    "author": "Agile Business Group, Therp BV, Tecnativa, "
+              "Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "application": False,
+    "installable": True,
+    "depends": [
+        "account",
+        "date_range",
+    ],
+    "data": [
+        "wizard/open_tax_balances_view.xml",
+        "views/account_move_view.xml",
+        "views/account_tax_view.xml",
+    ],
+    "images": [
+        'images/tax_balance.png',
+    ]
+}

account_tax_balance/i18n/es.po

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#	* account_tax_balance
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 9.0c\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2016-10-21 15:30+0000\n"
+"PO-Revision-Date: 2016-10-21 15:30+0000\n"
+"Last-Translator: <>\n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_search_balance
+msgid "Account"
+msgstr "Cuenta"
+
+#. module: account_tax_balance
+#: model:ir.model,name:account_tax_balance.model_account_move
+msgid "Account Entry"
+msgstr "Asiento contable"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_search_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "Account Tax"
+msgstr "Cuenta de impuesto"
+
+#. module: account_tax_balance
+#: selection:wizard.open.tax.balances,target_move:0
+msgid "All Entries"
+msgstr "Todos los asientos"
+
+#. module: account_tax_balance
+#: selection:wizard.open.tax.balances,target_move:0
+msgid "All Posted Entries"
+msgstr "Todos los asientos asentados"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_account_tax_balance_regular
+msgid "Balance"
+msgstr "Cuota"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_account_tax_balance_refund
+msgid "Balance Refund"
+msgstr "Cuota devoluciones"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_account_tax_base_balance_regular
+msgid "Base Balance"
+msgstr "Base imponible"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_account_tax_base_balance_refund
+msgid "Base Balance Refund"
+msgstr "Base devoluciones"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "Base Total"
+msgstr "Base total"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.wizard_open_tax_balances
+msgid "Cancel"
+msgstr "Cancelar"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_company_id
+msgid "Company"
+msgstr "Compañía"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_create_uid
+msgid "Created by"
+msgstr "Creado por"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_create_date
+msgid "Created on"
+msgstr "Creado en"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_date_range_id
+msgid "Date range"
+msgstr "Periodo"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_display_name
+msgid "Display Name"
+msgstr "Nombre a mostrar"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_from_date
+msgid "From date"
+msgstr "Desde"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_search_balance
+msgid "Group By"
+msgstr "Agrupar por"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_id
+msgid "ID"
+msgstr "ID"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances___last_update
+msgid "Last Modified on"
+msgstr "Última modificación en"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_write_uid
+msgid "Last Updated by"
+msgstr "Última modificación por"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_write_date
+msgid "Last Updated on"
+msgstr "Última actualización en"
+
+#. module: account_tax_balance
+#: selection:account.move,move_type:0
+msgid "Liquidity"
+msgstr "Liquidez"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_account_move_move_type
+msgid "Move type"
+msgstr "Tipo de operación"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.wizard_open_tax_balances
+msgid "Open Taxes"
+msgstr "Ver impuestos"
+
+#. module: account_tax_balance
+#: selection:account.move,move_type:0
+msgid "Other"
+msgstr "Otro"
+
+#. module: account_tax_balance
+#: selection:account.move,move_type:0
+msgid "Payable"
+msgstr "A pagar"
+
+#. module: account_tax_balance
+#: selection:account.move,move_type:0
+msgid "Payable refund"
+msgstr "Devoluciones a cobrar"
+
+#. module: account_tax_balance
+#: selection:account.move,move_type:0
+msgid "Receivable"
+msgstr "A cobrar"
+
+#. module: account_tax_balance
+#: selection:account.move,move_type:0
+msgid "Receivable refund"
+msgstr "Devoluciones a pagar"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_search_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "Short Name"
+msgstr "Nombre corto"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_target_move
+msgid "Target Moves"
+msgstr "Movimientos destino"
+
+#. module: account_tax_balance
+#: model:ir.model,name:account_tax_balance.model_account_tax
+msgid "Tax"
+msgstr "Impuesto"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_search_balance
+msgid "Tax Group"
+msgstr "Grupo del impuesto"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_search_balance
+msgid "Tax Scope"
+msgstr "Uso del impuesto"
+
+#. module: account_tax_balance
+#: model:ir.actions.act_window,name:account_tax_balance.action_open_tax_balances
+#: model:ir.actions.act_window,name:account_tax_balance.action_tax_balances_tree
+#: model:ir.ui.menu,name:account_tax_balance.menu_action_open_tax_balances
+#: model:ir.ui.view,arch_db:account_tax_balance.wizard_open_tax_balances
+msgid "Taxes Balance"
+msgstr "Tabla de impuestos"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_wizard_open_tax_balances_to_date
+msgid "To date"
+msgstr "Hasta"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "Total"
+msgstr "Total"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_account_tax_balance
+msgid "Total Balance"
+msgstr "Total cuota"
+
+#. module: account_tax_balance
+#: model:ir.model.fields,field_description:account_tax_balance.field_account_tax_base_balance
+msgid "Total Base Balance"
+msgstr "Total base imponible"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "View base lines"
+msgstr "Ver líneas de base imponible"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "View base refund lines"
+msgstr "Ver líneas de base imponible de devoluciones"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "View base regular lines"
+msgstr "Ver líneas de base imponible de operaciones corrientes"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "View tax lines"
+msgstr "Ver líneas de cuota"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "View tax refund lines"
+msgstr "Ver líneas de cuota de devoluciones"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.view_tax_tree_balance
+msgid "View tax regular lines"
+msgstr "Ver líneas de cuota de operaciones corrientes"
+
+#. module: account_tax_balance
+#: model:ir.ui.view,arch_db:account_tax_balance.wizard_open_tax_balances
+msgid "or"
+msgstr "o"
+
+#. module: account_tax_balance
+#: model:ir.model,name:account_tax_balance.model_wizard_open_tax_balances
+msgid "wizard.open.tax.balances"
+msgstr "wizard.open.tax.balances"

account_tax_balance/models/__init__.py

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+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import account_move
+from . import account_tax

account_tax_balance/models/account_move.py

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+# -*- coding: utf-8 -*-
+# © 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openerp import models, fields, api
+
+
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    move_type = fields.Selection(
+        string="Move type", selection=[
+            ('other', 'Other'),
+            ('liquidity', 'Liquidity'),
+            ('receivable', 'Receivable'),
+            ('receivable_refund', 'Receivable refund'),
+            ('payable', 'Payable'),
+            ('payable_refund', 'Payable refund'),
+        ], compute='_compute_move_type', store=True, readonly=True)
+
+    @api.multi
+    @api.depends('line_ids.account_id.internal_type', 'line_ids.balance')
+    def _compute_move_type(self):
+        def _balance_get(line_ids, internal_type):
+            return sum(line_ids.filtered(
+                lambda x: x.account_id.internal_type == internal_type).mapped(
+                    'balance'))
+
+        for move in self:
+            internal_types = move.line_ids.mapped('account_id.internal_type')
+            if 'liquidity' in internal_types:
+                move.move_type = 'liquidity'
+            elif 'payable' in internal_types:
+                balance = _balance_get(move.line_ids, 'payable')
+                move.move_type = (
+                    'payable' if balance < 0 else 'payable_refund')
+            elif 'receivable' in internal_types:
+                balance = _balance_get(move.line_ids, 'receivable')
+                move.move_type = (
+                    'receivable' if balance > 0 else 'receivable_refund')
+            else:
+                move.move_type = 'other'

account_tax_balance/models/account_tax.py

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+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# © 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openerp import models, fields, api
+from openerp.tools.safe_eval import safe_eval
+
+
+class AccountTax(models.Model):
+    _inherit = 'account.tax'
+
+    balance = fields.Float(
+        string="Total Balance", compute="_compute_balance",
+        search='_search_balance')
+    base_balance = fields.Float(
+        string="Total Base Balance", compute="_compute_balance",
+        search='_search_base_balance')
+    balance_regular = fields.Float(
+        string="Balance", compute="_compute_balance",
+        search='_search_balance_regular')
+    base_balance_regular = fields.Float(
+        string="Base Balance", compute="_compute_balance",
+        search='_search_base_balance_regular')
+    balance_refund = fields.Float(
+        string="Balance Refund", compute="_compute_balance",
+        search='_search_balance_refund')
+    base_balance_refund = fields.Float(
+        string="Base Balance Refund", compute="_compute_balance",
+        search='_search_base_balance_refund')
+
+    def _search_balance_field(self, field, operator, value):
+        operators = {'>', '<', '>=', '<=', '!=', '=', '<>'}
+        fields = {
+            'balance', 'base_balance', 'balance_regular',
+            'base_balance_regular', 'balance_refund', 'base_balance_refund',
+        }
+        domain = []
+        if operator in operators and field in fields:
+            value = float(value) if value else 0
+            taxes = self.search([]).filtered(
+                lambda x: safe_eval(
+                    '%.2f %s %.2f' % (x[field], operator, value)))
+            domain.append(('id', 'in', taxes.ids))
+        return domain
+
+    def _search_balance(self, operator, value):
+        return self._search_balance_field('balance', operator, value)
+
+    def _search_base_balance(self, operator, value):
+        return self._search_balance_field('base_balance', operator, value)
+
+    def _search_balance_regular(self, operator, value):
+        return self._search_balance_field('balance_regular', operator, value)
+
+    def _search_base_balance_regular(self, operator, value):
+        return self._search_balance_field(
+            'base_balance_regular', operator, value)
+
+    def _search_balance_refund(self, operator, value):
+        return self._search_balance_field('balance_refund', operator, value)
+
+    def _search_base_balance_refund(self, operator, value):
+        return self._search_balance_field(
+            'base_balance_refund', operator, value)
+
+    def get_context_values(self):
+        context = self.env.context
+        return (
+            context.get('from_date', fields.Date.context_today(self)),
+            context.get('to_date', fields.Date.context_today(self)),
+            context.get('company_id', self.env.user.company_id.id),
+            context.get('target_move', 'posted')
+        )
+
+    def _compute_balance(self):
+        for tax in self:
+            tax.balance_regular = tax.compute_balance(
+                tax_or_base='tax', move_type='regular')
+            tax.base_balance_regular = tax.compute_balance(
+                tax_or_base='base', move_type='regular')
+            tax.balance_refund = tax.compute_balance(
+                tax_or_base='tax', move_type='refund')
+            tax.base_balance_refund = tax.compute_balance(
+                tax_or_base='base', move_type='refund')
+            tax.balance = tax.balance_regular + tax.balance_refund
+            tax.base_balance = (
+                tax.base_balance_regular + tax.base_balance_refund)
+
+    def get_target_type_list(self, move_type=None):
+        if move_type == 'refund':
+            return ['receivable_refund', 'payable_refund']
+        elif move_type == 'regular':
+            return ['receivable', 'payable']
+        return []
+
+    def get_target_state_list(self, target_move="posted"):
+        if target_move == 'posted':
+            state = ['posted']
+        elif target_move == 'all':
+            state = ['posted', 'draft']
+        else:
+            state = []
+        return state
+
+    def get_move_line_partial_domain(self, from_date, to_date, company_id):
+        return [
+            ('date', '<=', to_date),
+            ('date', '>=', from_date),
+            ('company_id', '=', company_id),
+        ]
+
+    def compute_balance(self, tax_or_base='tax', move_type=None):
+        self.ensure_one()
+        move_lines = self.get_move_lines_domain(
+            tax_or_base=tax_or_base, move_type=move_type)
+        # balance is debit - credit whereas on tax return you want to see what
+        # vat has to be paid so:
+        # VAT on sales (credit) - VAT on purchases (debit).
+        total = -sum([l.balance for l in move_lines])
+        return total
+
+    def get_balance_domain(self, state_list, type_list):
+        domain = [
+            ('move_id.state', 'in', state_list),
+            ('tax_line_id', '=', self.id),
+        ]
+        if type_list:
+            domain.append(('move_id.move_type', 'in', type_list))
+        return domain
+
+    def get_base_balance_domain(self, state_list, type_list):
+        domain = [
+            ('move_id.state', 'in', state_list),
+            ('tax_ids', 'in', self.id),
+        ]
+        if type_list:
+            domain.append(('move_id.move_type', 'in', type_list))
+        return domain
+
+    def get_move_lines_domain(self, tax_or_base='tax', move_type=None):
+        move_line_model = self.env['account.move.line']
+        from_date, to_date, company_id, target_move = self.get_context_values()
+        state_list = self.get_target_state_list(target_move)
+        type_list = self.get_target_type_list(move_type)
+        domain = self.get_move_line_partial_domain(
+            from_date, to_date, company_id)
+        balance_domain = []
+        if tax_or_base == 'tax':
+            balance_domain = self.get_balance_domain(state_list, type_list)
+        elif tax_or_base == 'base':
+            balance_domain = self.get_base_balance_domain(
+                state_list, type_list)
+        domain.extend(balance_domain)
+        return move_line_model.search(domain)
+
+    def get_lines_action(self, tax_or_base='tax', move_type=None):
+        move_lines = self.get_move_lines_domain(
+            tax_or_base=tax_or_base, move_type=move_type)
+        move_line_ids = [l.id for l in move_lines]
+        action = self.env.ref('account.action_account_moves_all_tree')
+        vals = action.read()[0]
+        vals['context'] = {}
+        vals['domain'] = [('id', 'in', move_line_ids)]
+        return vals
+
+    @api.multi
+    def view_tax_lines(self):
+        self.ensure_one()
+        return self.get_lines_action(tax_or_base='tax')
+
+    @api.multi
+    def view_base_lines(self):
+        self.ensure_one()
+        return self.get_lines_action(tax_or_base='base')
+
+    @api.multi
+    def view_tax_regular_lines(self):
+        self.ensure_one()
+        return self.get_lines_action(tax_or_base='tax', move_type='regular')
+
+    @api.multi
+    def view_base_regular_lines(self):
+        self.ensure_one()
+        return self.get_lines_action(tax_or_base='base', move_type='regular')
+
+    @api.multi
+    def view_tax_refund_lines(self):
+        self.ensure_one()
+        return self.get_lines_action(tax_or_base='tax', move_type='refund')
+
+    @api.multi
+    def view_base_refund_lines(self):
+        self.ensure_one()
+        return self.get_lines_action(tax_or_base='base', move_type='refund')

account_tax_balance/tests/__init__.py

@@ -0,0 +1,6 @@
+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# © 2016 Giovanni Capalbo
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import test_account_tax_balance

account_tax_balance/tests/test_account_tax_balance.py

@@ -0,0 +1,145 @@
+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# © 2016 Giovanni Capalbo <giovanni@therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openerp.tests.common import TransactionCase
+from datetime import datetime
+from dateutil.rrule import MONTHLY
+
+
+class TestAccountTaxBalance(TransactionCase):
+
+    def setUp(self):
+        super(TestAccountTaxBalance, self).setUp()
+        self.range_type = self.env['date.range.type'].create(
+            {'name': 'Fiscal year',
+             'company_id': False,
+             'allow_overlap': False})
+        self.range_generator = self.env['date.range.generator']
+        self.current_year = datetime.now().year
+        self.current_month = datetime.now().month
+        range_generator = self.range_generator.create({
+            'date_start': '%s-01-01' % self.current_year,
+            'name_prefix': '%s-' % self.current_year,
+            'type_id': self.range_type.id,
+            'duration_count': 1,
+            'unit_of_time': MONTHLY,
+            'count': 12})
+        range_generator.action_apply()
+        self.range = self.env['date.range']
+
+    def test_tax_balance(self):
+        tax_account_id = self.env['account.account'].search(
+            [('name', '=', 'Tax Paid')], limit=1).id
+        tax = self.env['account.tax'].create({
+            'name': 'Tax 10.0%',
+            'amount': 10.0,
+            'amount_type': 'percent',
+            'account_id': tax_account_id,
+        })
+        invoice_account_id = self.env['account.account'].search(
+            [('user_type_id', '=', self.env.ref(
+                'account.data_account_type_receivable'
+            ).id)], limit=1).id
+        invoice_line_account_id = self.env['account.account'].search(
+            [('user_type_id', '=', self.env.ref(
+                'account.data_account_type_expenses').id)], limit=1).id
+        invoice = self.env['account.invoice'].create({
+            'partner_id': self.env.ref('base.res_partner_2').id,
+            'account_id': invoice_account_id,
+            'type': 'out_invoice',
+        })
+
+        self.env['account.invoice.line'].create({
+            'product_id': self.env.ref('product.product_product_4').id,
+            'quantity': 1.0,
+            'price_unit': 100.0,
+            'invoice_id': invoice.id,
+            'name': 'product that cost 100',
+            'account_id': invoice_line_account_id,
+            'invoice_line_tax_ids': [(6, 0, [tax.id])],
+        })
+        invoice._onchange_invoice_line_ids()
+        invoice._convert_to_write(invoice._cache)
+        self.assertEqual(invoice.state, 'draft')
+
+        # change the state of invoice to open by clicking Validate button
+        invoice.signal_workflow('invoice_open')
+
+        self.assertEquals(tax.base_balance, 100.)
+        self.assertEquals(tax.balance, 10.)
+        self.assertEquals(tax.base_balance_regular, 100.)
+        self.assertEquals(tax.balance_regular, 10.)
+        self.assertEquals(tax.base_balance_refund, 0.)
+        self.assertEquals(tax.balance_refund, 0.)
+
+        # testing wizard
+        current_range = self.range.search([
+            ('date_start', '=', '%s-%s-01' % (
+                self.current_year, self.current_month))
+        ])
+        wizard = self.env['wizard.open.tax.balances'].new({})
+        self.assertFalse(wizard.from_date)
+        self.assertFalse(wizard.to_date)
+        wizard = self.env['wizard.open.tax.balances'].new({
+            'date_range_id': current_range[0].id,
+        })
+        wizard.onchange_date_range_id()
+        wizard._convert_to_write(wizard._cache)
+        action = wizard.open_taxes()
+        self.assertEqual(
+            action['context']['from_date'], current_range[0].date_start)
+        self.assertEqual(
+            action['context']['to_date'], current_range[0].date_end)
+        self.assertEqual(
+            action['xml_id'], 'account_tax_balance.action_tax_balances_tree')
+
+        # testing buttons
+        tax_action = tax.view_tax_lines()
+        base_action = tax.view_base_lines()
+        self.assertTrue(
+            tax_action['domain'][0][2][0] in
+            [l.id for l in invoice.move_id.line_ids])
+        self.assertEqual(
+            tax_action['xml_id'], 'account.action_account_moves_all_tree')
+        self.assertTrue(
+            base_action['domain'][0][2][0] in
+            [l.id for l in invoice.move_id.line_ids])
+        self.assertEqual(
+            base_action['xml_id'], 'account.action_account_moves_all_tree')
+
+        # test specific method
+        state_list = tax.get_target_state_list(target_move='all')
+        self.assertEqual(state_list, ['posted', 'draft'])
+        state_list = tax.get_target_state_list(target_move='whatever')
+        self.assertEqual(state_list, [])
+
+        refund = self.env['account.invoice'].create({
+            'partner_id': self.env.ref('base.res_partner_2').id,
+            'account_id': invoice_account_id,
+            'type': 'out_refund',
+        })
+
+        self.env['account.invoice.line'].create({
+            'product_id': self.env.ref('product.product_product_2').id,
+            'quantity': 1.0,
+            'price_unit': 25.0,
+            'invoice_id': refund.id,
+            'name': 'returned product that cost 25',
+            'account_id': invoice_line_account_id,
+            'invoice_line_tax_ids': [(6, 0, [tax.id])],
+        })
+        refund._onchange_invoice_line_ids()
+        refund._convert_to_write(invoice._cache)
+        self.assertEqual(refund.state, 'draft')
+
+        # change the state of refund to open by clicking Validate button
+        refund.signal_workflow('invoice_open')
+
+        self.assertEquals(tax.base_balance, 75.)
+        self.assertEquals(tax.balance, 7.5)
+        self.assertEquals(tax.base_balance_regular, 100.)
+        self.assertEquals(tax.balance_regular, 10.)
+        self.assertEquals(tax.base_balance_refund, -25.)
+        self.assertEquals(tax.balance_refund, -2.5)

account_tax_balance/views/account_move_view.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
+<odoo>
+
+
+<record id="view_move_tree" model="ir.ui.view">
+    <field name="name">Add move type column</field>
+    <field name="model">account.move</field>
+    <field name="inherit_id" ref="account.view_move_tree"/>
+    <field name="arch" type="xml">
+        <field name="state" position="after">
+            <field name="move_type"/>
+        </field>
+    </field>
+</record>
+
+<record id="view_move_form" model="ir.ui.view">
+    <field name="name">Add move type field</field>
+    <field name="model">account.move</field>
+    <field name="inherit_id" ref="account.view_move_form"/>
+    <field name="arch" type="xml">
+        <field name="ref" position="after">
+            <field name="move_type"/>
+        </field>
+    </field>
+</record>
+
+<record id="view_account_move_filter" model="ir.ui.view">
+    <field name="name">Add move type group by</field>
+    <field name="model">account.move</field>
+    <field name="inherit_id" ref="account.view_account_move_filter"/>
+    <field name="arch" type="xml">
+        <group expand="0" position="inside">
+            <filter string="Move type" domain="[]" context="{'group_by':'move_type'}"/>
+        </group>
+    </field>
+</record>
+
+</odoo>

account_tax_balance/views/account_tax_view.xml

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2016 Lorenzo Battistini - Agile Business Group
+     Copyright 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
+<odoo>
+
+<record id="view_tax_tree_balance" model="ir.ui.view">
+    <field name="name">account.tax.tree.balance</field>
+    <field name="model">account.tax</field>
+    <field eval="100" name="priority"/>
+    <field name="arch" type="xml">
+        <tree string="Account Tax" create="false" delete="false">
+            <field name="name"/>
+            <field name="description" string="Short Name"/>
+            <field name="account_id"/>
+            <field name="balance_regular" sum="Total"/>
+            <button type="object" name="view_tax_regular_lines"
+                    string="View tax regular lines" icon="fa-search-plus"/>
+            <field name="base_balance_regular" sum="Base Total"/>
+            <button type="object" name="view_base_regular_lines"
+                    string="View base regular lines" icon="fa-search-plus"/>
+            <field name="balance_refund" sum="Total"/>
+            <button type="object" name="view_tax_refund_lines"
+                    string="View tax refund lines" icon="fa-search-plus"/>
+            <field name="base_balance_refund" sum="Base Total"/>
+            <button type="object" name="view_base_refund_lines"
+                    string="View base refund lines" icon="fa-search-plus"/>
+            <field name="balance" sum="Total"/>
+            <button type="object" name="view_tax_lines"
+                    string="View tax lines" icon="fa-search-plus"/>
+            <field name="base_balance" sum="Base Total"/>
+            <button type="object" name="view_base_lines"
+                    string="View base lines" icon="fa-search-plus"/>
+        </tree>
+    </field>
+</record>
+
+<record id="view_tax_search_balance" model="ir.ui.view">
+    <field name="name">account.tax.search.balance</field>
+    <field name="model">account.tax</field>
+    <field eval="100" name="priority"/>
+    <field name="arch" type="xml">
+        <search string="Account Tax">
+            <field name="name"/>
+            <field name="tag_ids"/>
+            <field name="description" string="Short Name"/>
+            <field name="type_tax_use"/>
+            <field name="account_id"/>
+            <group expand="0" string="Group By">
+                <filter string="Tax Group" domain="[]" context="{'group_by':'tax_group_id'}"/>
+                <filter string="Tax Scope" domain="[]" context="{'group_by':'type_tax_use'}"/>
+                <filter string="Account" domain="[]" context="{'group_by':'account_id'}"/>
+            </group>
+        </search>
+    </field>
+ </record>
+
+<record id="action_tax_balances_tree" model="ir.actions.act_window">
+    <field name="name">Taxes Balance</field>
+    <field name="res_model">account.tax</field>
+    <field name="view_type">form</field>
+    <field name="view_mode">tree</field>
+    <field name="domain">[
+        '|', '|', ('base_balance', '!=', 0), ('base_balance_regular', '!=', 0),
+        '|', '|', ('base_balance_refund', '!=', 0), ('balance', '!=', 0),
+        '|', ('balance_regular', '!=', 0), ('balance_refund', '!=', 0)]</field>
+    <field name="view_id" ref="view_tax_tree_balance"/>
+    <field name="search_view_id" ref="view_tax_search_balance"/>
+</record>
+
+</odoo>

account_tax_balance/wizard/__init__.py

@@ -0,0 +1,5 @@
+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import open_tax_balances

account_tax_balance/wizard/open_tax_balances.py

@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+# © 2016 Lorenzo Battistini - Agile Business Group
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openerp import models, fields, api
+
+
+class OpenTaxBalances(models.TransientModel):
+    _name = 'wizard.open.tax.balances'
+    company_id = fields.Many2one(
+        'res.company', 'Company', required=True,
+        default=lambda self: self.env.user.company_id)
+    from_date = fields.Date('From date', required=True)
+    to_date = fields.Date('To date', required=True)
+    date_range_id = fields.Many2one('date.range', 'Date range')
+    target_move = fields.Selection([
+        ('posted', 'All Posted Entries'),
+        ('all', 'All Entries'),
+    ], 'Target Moves', required=True, default='posted')
+
+    @api.onchange('date_range_id')
+    def onchange_date_range_id(self):
+        if self.date_range_id:
+            self.from_date = self.date_range_id.date_start
+            self.to_date = self.date_range_id.date_end
+        else:
+            self.from_date = self.to_date = None
+
+    @api.multi
+    def open_taxes(self):
+        self.ensure_one()
+        action = self.env.ref('account_tax_balance.action_tax_balances_tree')
+        vals = action.read()[0]
+        vals['context'] = {
+            'from_date': self.from_date,
+            'to_date': self.to_date,
+            'target_move': self.target_move,
+            'company_id': self.company_id.id,
+        }
+        return vals

account_tax_balance/wizard/open_tax_balances_view.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2016 Lorenzo Battistini - Agile Business Group
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
+<odoo>
+
+<record id="wizard_open_tax_balances" model="ir.ui.view">
+    <field name="name">wizard_open_tax_balances</field>
+    <field name="model">wizard.open.tax.balances</field>
+    <field name="arch" type="xml">
+        <form string="Taxes Balance">
+            <group>
+                <field name="company_id"/>
+                <field name="date_range_id"/>
+                <field name="from_date"></field>
+                <field name="to_date"></field>
+                <field name="target_move"></field>
+            </group>
+            <footer>
+                <button string="Open Taxes" name="open_taxes" type="object" class="oe_highlight"/>
+                or
+                <button string="Cancel" class="oe_link" special="cancel"/>
+            </footer>
+        </form>
+    </field>
+ </record>
+
+<record id="action_open_tax_balances" model="ir.actions.act_window">
+    <field name="name">Taxes Balance</field>
+    <field name="res_model">wizard.open.tax.balances</field>
+    <field name="view_type">form</field>
+    <field name="view_mode">form</field>
+    <field name="view_id" ref="wizard_open_tax_balances"/>
+    <field name="target">new</field>
+</record>
+
+<menuitem
+    action="action_open_tax_balances"
+    id="menu_action_open_tax_balances"
+    parent="account.menu_finance_reports"
+    groups="account.group_account_user,account.group_account_manager"/>
+
+</odoo>