diff -r e09ed092a99d view/tax_code_list.xml
--- a/trytond/trytond/modules/account/view/tax_code_list.xml	Sat Apr 02 15:59:02 2016 +0200
+++ b/trytond/trytond/modules/account/view/tax_code_list.xml	Tue Apr 26 16:35:50 2016 +0200
@@ -5,5 +5,5 @@
     <field name="name"/>
     <field name="code"/>
     <field name="company"/>
-    <field name="active"/>
+    <field name="active" tree_invisible="1"/>
 </tree>
diff -r e09ed092a99d view/tax_list.xml
--- a/trytond/trytond/modules/account/view/tax_list.xml	Sat Apr 02 15:59:02 2016 +0200
+++ b/trytond/trytond/modules/account/view/tax_list.xml	Tue Apr 26 16:35:50 2016 +0200
@@ -5,5 +5,5 @@
     <field name="name"/>
     <field name="group"/>
     <field name="type"/>
-    <field name="active"/>
+    <field name="active" tree_invisible="1"/>
 </tree>