diff --git a/addons/account/account.py b/addons/account/account.py
index 3df1dc622d1..8f1329cc30e 100644
--- a/addons/account/account.py
+++ b/addons/account/account.py
@@ -2002,12 +2002,12 @@ class wizard_multi_charts_accounts(osv.osv_memory):
                 'python_compute_inv': tax.python_compute_inv,
                 'python_applicable': tax.python_applicable,
                 'tax_group':tax.tax_group,
-                'base_code_id': tax.base_code_id and tax_code_template_ref[tax.base_code_id.id] or False,
-                'tax_code_id': tax.tax_code_id and tax_code_template_ref[tax.tax_code_id.id] or False,
+                'base_code_id': tax.base_code_id and ((tax.base_code_id.id in tax_code_template_ref) and tax_code_template_ref[tax.base_code_id.id]) or False,
+                'tax_code_id': tax.tax_code_id and ((tax.tax_code_id.id in tax_code_template_ref) and tax_code_template_ref[tax.tax_code_id.id]) or False,
                 'base_sign': tax.base_sign,
                 'tax_sign': tax.tax_sign,
-                'ref_base_code_id': tax.ref_base_code_id and tax_code_template_ref[tax.ref_base_code_id.id] or False,
-                'ref_tax_code_id': tax.ref_tax_code_id and tax_code_template_ref[tax.ref_tax_code_id.id] or False,
+                'ref_base_code_id': tax.ref_base_code_id and ((tax.ref_base_code_id.id in tax_code_template_ref) and tax_code_template_ref[tax.ref_base_code_id.id]) or False,
+                'ref_tax_code_id': tax.ref_tax_code_id and ((tax.ref_tax_code_id.id in tax_code_template_ref) and tax_code_template_ref[tax.ref_tax_code_id.id]) or False,
                 'ref_base_sign': tax.ref_base_sign,
                 'ref_tax_sign': tax.ref_tax_sign,
                 'include_base_amount': tax.include_base_amount,