euvat-change-vat-rate.php

<?php
/**
 * This is an example of how to change the default tax rate of a country
 * This snippet is meant for the EU VAT for Gravity forms add-on
 *
 * @author Johan d'Hollander
 * @link https://geekontheroad.com/eu-vat-for-gravity-forms/
 **/

add_filter( 'gotreu_standard_vat_rate', 'example_change_vat_rate', 10, 2 );

/**
 * Change the standard VAT rate for a specific country.
 * 
 * @param float $vat_rate The standard VAT rate.
 * @param string $country_code The country code.
 * @return float The new VAT rate.
 */
function example_change_vat_rate( $vat_rate, $country_code ) {
    // Change the rate for the Netherlands to 19%
    if ( $country_code == 'NL' ) {
        return 19;
    }
    return $vat_rate;
}