intrastat-extrastat/intrastat_product/views/account_invoice.xml

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

    <record id="invoice_form" model="ir.ui.view">
      <field name="name">intrastat.invoice.form</field>
      <field name="model">account.invoice</field>
      <field name="inherit_id" ref="account.invoice_form"/>
      <field name="arch" type="xml">
        <xpath expr="//page[@name='other_info']//field[@name='name']" position="after">
          <field name="intrastat_transaction_id"/>
          <field name="intrastat" invisible="1"/>
          <field name="intrastat_transport_id"
                 attrs="{'invisible': [('intrastat', '!=', 'extended')]}"
                 widget="selection"/>
          <field name="src_dest_country_id" string="Destination Country"/>
          <field name="src_dest_region_id" string="Origin Region" invisible="1"/>
        </xpath>
        <xpath expr="//field[@name='invoice_line_ids']//field[@name='account_id']" position="after">
          <field name="hs_code_id" invisible="1"/>
        </xpath>
      </field>
    </record>

    <record id="invoice_supplier_form" model="ir.ui.view">
      <field name="name">intrastat.invoice.supplier.form</field>
      <field name="model">account.invoice</field>
      <field name="inherit_id" ref="account.invoice_supplier_form"/>
      <field name="arch" type="xml">
        <xpath expr="//field[@name='payment_term_id']" position="after">
          <field name="incoterms_id"
                 attrs="{'invisible': [('intrastat', '!=', 'extended')]}"/>
        </xpath>
        <xpath expr="//page/group/group/field[@name='company_id']" position="after">
          <field name="intrastat_transaction_id"/>
          <field name="intrastat" invisible="1"/>
          <field name="intrastat_transport_id"
                 attrs="{'invisible': [('intrastat', '!=', 'extended')]}"
                 widget="selection"/>
          <field name="src_dest_country_id" string="Origin Country"/>
          <field name="src_dest_region_id" string="Destination Region" invisible="1"/>
        </xpath>
        <xpath expr="//field[@name='invoice_line_ids']//field[@name='account_id']" position="after">
          <field name="hs_code_id" invisible="1"/>
        </xpath>
      </field>
    </record>

</odoo>