suite/hr_payroll_payment/views/hr_payslip_views.xml

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>
    <!-- Add Filter for "Needs Payment" -->
    <record id="payslip_filter_payment" model="ir.ui.view">
        <field name="name">hr.payslip.select.payment</field>
        <field name="model">hr.payslip</field>
        <field name="inherit_id" ref="hr_payroll.view_hr_payslip_filter"/>
        <field name="arch" type="xml">
             <xpath expr="//filter[last()]" position="after">
                 <filter name="filter_needs_payment" string="Needs Payment" domain="[('is_paid', '=', False)]"
                         help="Needs Payment or Reconciliation"/>
             </xpath>
        </field>
    </record>

    <record id="payslip_run_filter_payment" model="ir.ui.view">
        <field name="name">hr.payslip.run.select.payment</field>
        <field name="model">hr.payslip.run</field>
        <field name="inherit_id" ref="hr_payroll.hr_payslip_run_filter"/>
        <field name="arch" type="xml">
             <xpath expr="//filter[last()]" position="after">
                 <filter name="filter_needs_payment" string="Needs Payment" domain="[('is_paid', '=', False)]"
                         help="Slips needs Payment or Reconciliation"/>
             </xpath>
        </field>
    </record>

    <!-- Button on Payslip to launch Wizard for register payment -->
    <record id="hr_payslip_form_payment" model="ir.ui.view">
        <field name="name">hr.payslip.form.payment</field>
        <field name="model">hr.payslip</field>
        <field name="inherit_id" ref="hr_payroll.view_hr_payslip_form"/>
        <field name="arch" type="xml">
            <xpath expr="//button[@name='refund_sheet']" position="before">
                <button name="action_register_payment" type="object" string="Register Payment" class="oe_highlight"
                        attrs="{'invisible': ['|', ('state', '!=', 'done'), ('is_paid', '=', True)]}"
                        groups="account.group_account_user"/>
            </xpath>
            <xpath expr="//field[@name='credit_note']" position="after">
                <field name="is_paid" readonly="1"/>
            </xpath>
        </field>
    </record>

    <record id="hr_payslip_run_form_payment" model="ir.ui.view">
        <field name="name">hr.payslip.run.form.payment</field>
        <field name="model">hr.payslip.run</field>
        <field name="inherit_id" ref="hr_payroll.hr_payslip_run_form"/>
        <field name="arch" type="xml">
            <xpath expr="//button[@name='action_validate']" position="after">
                <button name="action_register_payment" type="object" string="Register Payment" class="oe_highlight"
                        attrs="{'invisible': ['|', ('state', '!=', 'close'), ('is_paid', '=', True)]}"
                        groups="account.group_account_user"/>
            </xpath>
            <xpath expr="//field[@name='credit_note']" position="after">
                <field name="is_paid" readonly="1"/>
                <field name="date"/>
                <field name="batch_payment_id" attrs="{'invisible': [('batch_payment_id', '=', False)]}"/>
            </xpath>
        </field>
    </record>

    <!-- contract -->
    <record id="hr_contract_view_form_inherit" model="ir.ui.view">
        <field name="name">hr.contract.view.form.inherit</field>
        <field name="model">hr.contract</field>
        <field name="inherit_id" ref="hr_payroll_account.hr_contract_view_form"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='analytic_account_id']" position="after">
                <field name="payroll_fiscal_position_id"/>
            </xpath>
        </field>
    </record>

</odoo>