eiru_payslip_payments/view/payslip_payments.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
	<data>
        <record id="view_eiru_payslip_payments" model="ir.ui.view">
            <field name="name">view.eiru.payslip.payments</field>
            <field name="model">hr.payslip.run</field>
            <field name="inherit_id" ref="hr_payroll.hr_payslip_run_form"/>
            <field name="arch" type="xml">
                <field name="state" position="before">
                    <div class="eiru-payslip-payments" attrs="{'invisible': [('state','!=','close')]}"></div>
                </field>
            </field>
        </record>

		<!--ADD botton en  payslip -->
		<record id="view_eiru_payment_payslip_unity" model="ir.ui.view">
			<field name="name">view.eiru.payment.payslip.unity</field>
			<field name="model">hr.payslip</field>
			<field name="inherit_id" ref="hr_payroll.view_hr_payslip_form"/>
			<field name="arch" type="xml">
				<!-- from  -->
				<form position="attributes">
					<attribute name="create">0</attribute>
				</form>
				<!-- Payments pauslip -->
				<field name="state" position="before">
					<div class="payslip-payment-unity" attrs="{'invisible': [('state','!=','done')]}"></div>
				</field>
				<!-- Abono  -->
				<field name="credit_note" position="replace"></field>
				<!-- Factura crédito -->
				<xpath expr="//button[@name='refund_sheet']" position="replace"></xpath>
			</field>
		</record>

		<!--Tree -->
		<record id="view_eiru_payment_payslip_unity_tree" model="ir.ui.view">
			<field name="name">view.eiru.payment.payslip.unity.tree</field>
			<field name="model">hr.payslip</field>
			<field name="inherit_id" ref="hr_payroll.view_hr_payslip_tree"/>
			<field name="arch" type="xml">
				<!-- tree -->
				<tree position="attributes">
					<attribute name="create">0</attribute>
				</tree>
			</field>
		</record>


	</data>
</openerp>