suite/sale_payment_web/wizard/account_payment_register_views.xml

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>

    <record id="view_account_payment_register_form_inherit" model="ir.ui.view">
        <field name="name">account.payment.form.multi.inherit</field>
        <field name="model">account.payment.register</field>
        <field name="inherit_id" ref="account.view_account_payment_register_form"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='company_currency_id']" position="after">
                <field name="sale_order_id" invisible="1"/>
                <field name="so_amount_over" invisible="1"/>
                <field name="so_amount_remaining" invisible="1"/>
            </xpath>
            <xpath expr="//field[@name='payment_difference_handling']" position="attributes">
                <attribute name="attrs">{'invisible': [('sale_order_id', '!=', False)]}</attribute>
            </xpath>
            <xpath expr="//group[@name='group3']" position="after">
                <group name="group_so_amount_over" attrs="{'invisible':[('so_amount_over', '=', False)]}" class="text-danger" colspan="4">
                    <p>
                        You cannot make a payment for more than the difference of the total amount and existing payments:
                        <field name="so_amount_remaining"/>
                    </p>
                </group>
            </xpath>
        </field>
    </record>

</odoo>