account_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>


    <record model ="ir.ui.view" id="view_vat_report_tree">
        <field name="name">vat.report.tree</field>
        <field name="model">account.tax.vat_report</field>
        <field name="arch" type="xml">
		<tree string="VAT Report" version="7.0">
	              <field name="journal_id" />
	              <field name="invoice_number" />
	              <field name="supplier_invoice_number" />
	              <field name="account_id" />
	              <field name="tax_name" />
		      <field name="date_invoice" />
		      <field name="year" invisible="1" />
		      <field name="month" invisible="1" />
		      <field name="day" invisible="1" />
	              <field name="invoice_type" />
	              <field name="partner_id" />
	              <field name="document_type_name" />
	              <field name="document_number" />
	              <field name="responsability_name" />
	              <field name="base_amount" sum="Monto Neto"/>
	              <field name="tax_amount" sum="Monto Impuesto"/>
	              <field name="amount" sum="Monto"/>
		</tree>
	</field>
    </record>

    <record id="view_vat_report_filter" model="ir.ui.view">
            <field name="name">vat.report.list.select</field>
            <field name="model">account.tax.vat_report</field>
            <field name="arch" type="xml">
                <search string="Search VAT Report">
                    <field name="partner_id" string="Partner" />
	            <group expand="1" string="Group By ...">
	                   <filter string="Journal" icon="terp-stage" domain="[]" context="{'group_by':'journal_id'}" />
	                   <filter string="Tax" icon="terp-stage" domain="[]" context="{'group_by':'tax_name'}" />
        	           <filter string="Month" icon="terp-go-month" domain="[]" context="{'group_by':'month'}" help="Start Date"/>
                	   <filter string="Year" icon="terp-go-year" domain="[]" context="{'group_by':'year'}" help="Start Date"/>
                    </group>
                    <filter string="Sales" domain="[('invoice_type','=','out_invoice')]" help="Sale invoices"/>
                    <filter string="Purchases" domain="[('invoice_type','=','in_invoice')]" help="Purchase invoices"/>
               </search>
            </field>
    </record>



    <record model="ir.actions.act_window" id="action_vat_reportview">
        <field name="name">VAT Report View</field>
        <field name="res_model">account.tax.vat_report</field>
        <field name="view_type">form</field>
        <field name="view_mode">tree</field>
        <field name="context">{'search_default_year':1,'search_default_month':1,'group_by':[]}</field>
        <field name="view_id" ref="view_vat_report_tree" />
        <field name="search_view_id" ref="view_vat_report_filter" />
    </record>


    <menuitem
            id="menu_vat_report"
            name="VAT Report"
            parent="account.menu_finance_generic_reporting" sequence="4"
	    action="action_vat_reportview"	/>
    <!-- menuitem
            id="menu_vat_report"
            name="VAT Report"
            groups="account.group_account_user,account.group_account_manager"
            parent="account.menu_finance_generic_reporting" sequence="4"/ -->

   </data>
</openerp>