diff --git a/tax.xml b/tax.xml
index 4e0cf391d2..45743c2c47 100644
--- a/tax.xml
+++ b/tax.xml
@@ -227,7 +227,7 @@ this repository contains the full copyright notices and license terms. -->
             <field name="field_childs">childs</field>
             <field name="arch" type="xml">
                 <![CDATA[
-                <tree string="Tax Codes">
+                <tree string="Tax Codes" keyword_open="1">
                     <field name="name"/>
                     <field name="code"/>
                     <field name="sum"/>