tryton/modules/account/view/tax_code_form.xml

<?xml version="1.0"?>
<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
this repository contains the full copyright notices and license terms. -->
<form col="6">
    <label name="name"/>
    <field name="name"/>
    <label name="code"/>
    <field name="code"/>
    <group col="-1" colspan="2" id="checkboxes">
        <label name="active"/>
        <field name="active" xexpand="0" width="100"/>
        <label name="template_override"/>
        <field name="template_override" xexpand="0" width="100"/>
    </group>
    <label name="company"/>
    <field name="company"/>
    <label name="parent"/>
    <field name="parent"/>
    <newline/>
    <label name="start_date"/>
    <field name="start_date"/>
    <label name="end_date"/>
    <field name="end_date"/>
    <notebook colspan="6">
        <page name="lines">
            <field name="lines" colspan="4"/>
        </page>
        <page name="childs">
            <field name="childs" colspan="4"/>
        </page>
        <page name="description">
            <field name="description" colspan="4"/>
        </page>
    </notebook>
</form>