suite/hr_payroll_slip_ytd/views/payslip_views.xml

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>
    <template id="report_payslip_inherit" name="Payslip YTD" inherit_id="hr_payroll.report_payslip">
        <!-- Add YTD to basic salary summary -->
        <xpath expr="//table[2]/tr" position="inside">
            <t t-set="ytd" t-value="o.ytd('BASIC', allow_draft=True)"/>
            <td><strong>YTD</strong></td>
            <td><span t-esc="ytd.get('total', 0.0)" t-options="{&quot;widget&quot;: &quot;monetary&quot;, &quot;display_currency&quot;: o.company_id.currency_id}"/></td>
        </xpath>

        <!-- Revert the way quantity is represented on the payslip -->
        <xpath expr="//div[@id='total']/table/thead/tr//th[3]" position="replace">
            <th>Quantity/Number of Days</th>
        </xpath>
        <xpath expr="//div[@id='total']/table/tbody/span[2]//td[3]/span" position="attributes">
            <attribute name="t-if"/>
        </xpath>

        <!-- Add YTD to the table head-->
        <xpath expr="//div[@id='total']/table/thead/tr//th[last()]" position="after">
            <th>Total</th>
            <th>YTD Quantity</th>
            <th>YTD Amount</th>
            <th>YTD Total</th>
        </xpath>


        <!-- Add YTD worked days data -->
        <xpath expr="//div[@id='total']/table/tbody/span[1]//td[last()]" position="after">
            <t t-set="worked_ytd" t-value="o.worked_ytd(worked_days.code, allow_draft=True)"/>
            <td/>
            <td/>
            <td><span t-esc="worked_ytd.get('amount', 0.0)" t-options="{&quot;widget&quot;: &quot;monetary&quot;, &quot;display_currency&quot;: o.company_id.currency_id}"/></td>
            <td/>
        </xpath>

        <!-- Re-add column for line amount -->
        <xpath expr="//div[@id='total']/table/tbody/span[2]//td[last()]" position="before">
            <td><span t-esc="line.amount"
                      t-options='{"widget": "monetary", "display_currency": o.company_id.currency_id}'/></td>
        </xpath>

        <!-- Add YTD table data-->
        <xpath expr="//div[@id='total']/table/tbody/span[2]//td[last()]" position="after">
             <t t-set="ytd" t-value="o.ytd(line.code, allow_draft=True)"/>
             <td><span t-esc="ytd.get('quantity', 0.0)"/></td>
             <td><span t-esc="ytd.get('amount', 0.0)" t-options="{&quot;widget&quot;: &quot;monetary&quot;, &quot;display_currency&quot;: o.company_id.currency_id}"/></td>
             <td><span t-esc="ytd.get('total', 0.0)" t-options="{&quot;widget&quot;: &quot;monetary&quot;, &quot;display_currency&quot;: o.company_id.currency_id}"/></td>
        </xpath>
    </template>
</odoo>