diff --git a/pos_order_return/models/pos_order.py b/pos_order_return/models/pos_order.py
index 8d45c3cb..f8e42613 100644
--- a/pos_order_return/models/pos_order.py
+++ b/pos_order_return/models/pos_order.py
@@ -93,6 +93,8 @@ class PosOrder(models.Model):
                     'returned_line_id': wizard_line.pos_order_line_id.id,
                     'qty': qty,
                 })
+                copy_line._onchange_amount_line_all()
+        new_order._onchange_amount_all()
         return res
 
     def action_pos_order_paid(self):