No tax for companies from foreign Countries in WooCommerce

I need to set a different tax class for company whose field nip is different than polish in WooCommerce

I have in my checkout field nip, and I want the tax to change to 0% after entering the tax number, e.g. RO123456789. I have 2 class tax Standard and zero rate if I have nip PL123456789 I want the rate to be standard.

i have this code and this didn’t work and I don’t know why.Any guidance on resolving this issue would be highly appreciated.

// Add the Tax Identification Number field at checkout
add_action( 'woocommerce_after_order_notes', 'custom_add_nip_field' );

function custom_add_nip_field( $checkout ) {
    echo '<div id="custom_nip_field"><h2>' . __('Dane firmy') . '</h2>';

    woocommerce_form_field( 'vat_nip', array(
        'type'          => 'text',
        'class'         => array('vat-nip-field form-row-wide'),
        'label'         => __('Numer NIP (dla firm z UE)'),
        'placeholder'   => __('Wpisz numer VAT UE'),
    ), $checkout->get_value( 'vat_nip' ));

    echo '</div>';
}

// NIP from field to checkout
add_action( 'woocommerce_checkout_update_order_meta', 'custom_save_nip_field' );

function custom_save_nip_field( $order_id ) {
    if ( ! empty( $_POST['vat_nip'] ) ) {
        update_post_meta( $order_id, '_vat_nip', sanitize_text_field( $_POST['vat_nip'] ) );
    }
}
// Apply 0% VAT for companies from outside Poland based on the NIP number
add_action( 'woocommerce_cart_calculate_fees', 'custom_apply_vat_exemption_based_on_nip' );

function custom_apply_vat_exemption_based_on_nip() {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
        return;
    }

    // Download the Tax Identification Number from the field at the checkout
    $vat_nip = isset( $_POST['vat_nip'] ) ? sanitize_text_field( $_POST['vat_nip'] ) : '';

    // Check if the NIP does not start with "PL"
    if ( ! empty( $vat_nip ) && substr( $vat_nip, 0, 2 ) !== 'PL' ) {
        // Assign a 'zero rate' tax class to the products in your cart
        foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
            $cart_item['data']->set_tax_class( 'zero rate' ); // set tax zero rate (0% VAT)
        }
    }
}

I try some plugins but didn’t work as I expect.