trytond-aeat_sii/view/account_invoice_form.xml

<?xml version="1.0"?>
<!--The COPYRIGHT file at the top level of this repository
contains the full copyright notices and license terms. -->
<data>
    <xpath expr="/form/notebook"  position="inside">
      <page id="sii" string="Aeat SII">
          <label name="sii_book_key"/>
          <field name="sii_book_key" colspan="3"/>
          <label name="sii_operation_key"/>
          <field name="sii_operation_key" colspan="3"/>
          <label name="sii_subjected_key"/>
          <field name="sii_subjected_key" colspan="3"/>
          <label name="sii_issued_key"/>
          <field name="sii_issued_key" colspan="3"/>
          <label name="sii_received_key"/>
          <field name="sii_received_key" colspan="3"/>
          <label name="sii_intracomunity_key"/>
          <field name="sii_intracomunity_key" colspan="3"/>
          <label name="sii_excemption_key"/>
          <field name="sii_excemption_key" colspan="3"/>
          <field name="sii_records" colspan="4"/>
          <label name="sii_communication_type"/>
          <field name="sii_communication_type"/>
          <label name="sii_state"/>
          <field name="sii_state"/>
        </page>
    </xpath>
</data>