Checkout Fields for Free Products

/** =BMZ Checkout Fields for Free Products and User logged_in/not_logged_in */
add_filter( 'woocommerce_checkout_fields', 'bmz_checkout_fields', 20 );
function bmz_checkout_fields( $fields ) {
    //global $woocommerce;

    // standard
    if ( is_checkout() && WC()->cart->needs_payment() || is_checkout() && WC()->cart->needs_shipping() ) {
        unset($fields['billing']['billing_address_2']);
        //unset($fields['billing']['billing_country']);

        return $fields;
    }

    // user not logged in
    if ( !is_user_logged_in() ) {
            remove_action( 'woocommerce_before_checkout_form', 'woocommerce_checkout_coupon_form', 10 );
            remove_filter('woocommerce_after_order_notes','bmz_paid_product_order_notes'); //my notes for user + paid product
            add_filter('woocommerce_after_order_notes','bmz_free_product_order_notes'); // my notes for user + free product
            add_filter( 'woocommerce_order_button_text', create_function( '', 'return "Free For You";' ) );

            /***** woo themes eu vat number plugin *******/
            remove_filter('woocommerce_after_checkout_billing_form', array('WC_EU_VAT_Number', 'vat_number_field'));

            unset( $fields['billing']['billing_country'] );
            unset( $fields['billing']['billing_company'] );
            unset( $fields['billing']['billing_address_1'] );
            unset( $fields['billing']['billing_address_2'] );
            unset( $fields['billing']['billing_city'] );
            unset( $fields['billing']['billing_state'] );
            unset( $fields['billing']['billing_postcode'] );
            unset( $fields['billing']['billing_phone'] );
        return $fields;
    }

    // user logged in
    remove_action( 'woocommerce_before_checkout_form', 'woocommerce_checkout_coupon_form', 10 );
    remove_filter('woocommerce_after_order_notes','bmz_paid_product_order_notes'); // my notes for user + paid product
    add_filter('woocommerce_after_order_notes','bmz_free_product_order_notes_logged_in_user');  //my notes for user + free product
    add_filter( 'woocommerce_order_button_text', create_function( '', 'return "Acquista gratuitamente";' ) );

    /***** woothemes eu vat number plugin*******/
    remove_filter('woocommerce_after_checkout_billing_form', array('WC_EU_VAT_Number', 'vat_number_field'));

    unset( $fields['billing']['billing_first_name']);
    unset( $fields['billing']['billing_last_name']);
    unset( $fields['billing']['billing_country'] );
    unset( $fields['billing']['billing_company'] );
    unset( $fields['billing']['billing_address_1'] );
    unset( $fields['billing']['billing_address_2'] );
    unset( $fields['billing']['billing_city'] );
    unset( $fields['billing']['billing_state'] );
    unset( $fields['billing']['billing_postcode'] );
    unset( $fields['billing']['billing_phone'] );
    //unset( $fields['billing']['vat_number_field'] );

    return $fields;
}