trytond-account_payment_type/view/invoice_form.xml

<?xml version="1.0"?>
<data>
    <xpath
    expr="/form/notebook/page[@id=&quot;invoice&quot;]/field[@name=&quot;payment_term&quot;]"
    position="after">
        <label name="payment_type"/>
        <field name="payment_type"/>
    </xpath>
</data>