account_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  product_multi_price for OpenERP
  Copyright (C) 2011 Akretion Benoît GUILLOT <benoit.guillot@akretion.com>
  The licence is in the file __openerp__.py
-->
<openerp>
    <data>

        <!-- INHERITED VIEW FOR THE OBJECT : account_tax -->

        <record id="product_multi_price_account_tax_view_form" model="ir.ui.view">
            <field name="name">product_multi_price.account_tax.view_tax_form</field>
            <field name="model">account.tax</field>
            <field name="inherit_id" ref="account.view_tax_form" />
            <field eval="16" name="priority"/>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <data>
                    <field name="price_include" position="after">
                        <field name="related_inc_tax_id" attrs="{'invisible':[('price_include', '=', True)]}" />
                    </field>
                </data>
            </field>
        </record>

    </data>
</openerp>