Adjust VAT amount for VAT Add On PMPro

adjust-my-vat.php

<?php
/**
 * Adjust VAT amount charged from VAT Tax Add On Paid Memberships Pro.
 * Adjust the code to your liking/needs.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function adjust_my_pmpro_vat( $vat ) {
  
  $vat['DE'] = 0.25; //Change VAT to 25% for Germany.
  
  return $vat;
}
add_filter( 'pmpro_vat_by_country', 'adjust_my_pmpro_vat', 10, 1 );