From c5ba3bb9aef55562c52e55a9bcc8a12227638b82 Mon Sep 17 00:00:00 2001
From: Yannick Tivisse <yti@odoo.com>
Date: Fri, 11 Sep 2015 11:53:31 +0200
Subject: [PATCH] [FIX] sale: Set tax_id on a sale order line if taxes_id is
 set on product

And why the hell are these many2many fields called tax_id and taxes_id
---
 addons/sale/sale.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index b150ebedbe4..53ff23f9f1a 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -444,7 +444,7 @@ class SaleOrderLine(models.Model):
                     taxes = fpos.map_tax(line.product_id.taxes_id)
                 line.tax_id = taxes
             else:
-                line.tax_id = False
+                line.tax_id = line.product_id.taxes_id if line.product_id.taxes_id else False
 
     @api.multi
     def _prepare_order_line_procurement(self, group_id=False):