[FIX] point_of_sale: use mapped taxes when creating account moves

We have a tax_ids_after_fiscal_position field on pos.order.line that
contains the mapped taxes. We should use that to create the account
moves. Otherwise the Point of Sale will create unbalanced journal
entries.

Fixes #9815

addons/point_of_sale/point_of_sale.py

@@ -1324,7 +1324,7 @@ class pos_order(osv.osv):
 
                 # Create the tax lines
                 taxes = []
-                for t in line.product_id.taxes_id:
+                for t in line.tax_ids_after_fiscal_position:
                     if t.company_id.id == current_company.id:
                         taxes.append(t.id)
                 if not taxes: