[FIX] sale_coupon(_delivery): Filter the taxes by company.

In this case for scenario with multi-company, the new line of the reward product, should be set with the taxes for company of the current sale order.
Before this change the taxes that are selected were for the all companies setted in the product.

closes odoo/odoo#68029

X-original-commit: eb6ba44a6bfd0ebfce887edc307e0306765e5183
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

addons/sale_coupon/models/sale_order.py

@@ -99,7 +99,8 @@ class SaleOrder(models.Model):
 
         reward_qty = min(int(int(max_product_qty / program.rule_min_quantity) * program.reward_product_quantity), reward_product_qty)
         # Take the default taxes on the reward product, mapped with the fiscal position
-        taxes = self.fiscal_position_id.map_tax(program.reward_product_id.taxes_id)
+        taxes = program.reward_product_id.taxes_id.filtered(lambda t: t.company_id.id == self.company_id.id)
+        taxes = self.fiscal_position_id.map_tax(taxes)
         return {
             'product_id': program.discount_line_product_id.id,
             'price_unit': - price_unit,

addons/sale_coupon_delivery/models/sale_order.py

@@ -26,7 +26,8 @@ class SaleOrder(models.Model):
 
     def _get_reward_values_free_shipping(self, program):
         delivery_line = self.order_line.filtered(lambda x: x.is_delivery)
-        taxes = self.fiscal_position_id.map_tax(delivery_line.product_id.taxes_id)
+        taxes = delivery_line.product_id.taxes_id.filtered(lambda t: t.company_id.id == self.company_id.id)
+        taxes = self.fiscal_position_id.map_tax(taxes)
         return {
             'name': _("Discount: %s", program.name),
             'product_id': program.discount_line_product_id.id,