VAT Tax Add On: Apply tax for ALL UK customers

apply-tax-for-ALL-UK-customers.php

<?php
/**
 * Apply tax for ALL UK customers
 * 
 * Requires VAT Tax Add On
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmprovat_set_uk_vat_rate( $rates ) {
    $rates['GB'] = 0.20; // 20% UK VAT
    return $rates;
}
add_filter( 'pmpro_vat_by_country', 'my_pmprovat_set_uk_vat_rate' );

function my_pmprovat_disable_uk_vat_exemption( $tax, $values, $vat_rate, $vat_number, $eucountry, $bstate ) {
    // Only affect UK customers.
    if ( 'GB' !== $eucountry ) {
        return $tax;
    }

    // If a rate was already applied, no VAT number was used — leave it alone.
    if ( ! empty( $vat_rate ) ) {
        return $tax;
    }

    // Rate is 0 for GB, meaning the VAT number exemption was granted. Re-apply UK VAT.
    if ( function_exists( 'pmprovat_getTaxRate' ) && ! empty( $values['price'] ) ) {
        $uk_rate = pmprovat_getTaxRate( 'GB' ); // pulls 0.20 from the plugin's own rate table
        if ( ! empty( $uk_rate ) ) {
            $tax += round( (float) $values['price'] * $uk_rate, 2 );
        }
    }

    return $tax;
}
add_filter( 'pmprovat_calculated_taxes', 'my_pmprovat_disable_uk_vat_exemption', 10, 6 );