diff --git a/odex25_realstate/property_management/models/rental_contract.py b/odex25_realstate/property_management/models/rental_contract.py
index 62a6c0d02..55086b4e1 100644
--- a/odex25_realstate/property_management/models/rental_contract.py
+++ b/odex25_realstate/property_management/models/rental_contract.py
@@ -597,6 +597,7 @@ class RentalContract(models.Model):
 
         # Update amounts (e.g., tax calculations) for each rent payment line
         for line in self.rent_payment_ids:
+            line.write({'tax_id': self.tax_id.id})
             line.get_untaxed_amount()
             line.get_total_amount()