Tax for Woo Product Single

function frb_the_tax_price( $args = array() ) {

    global $post;

    $args = wp_parse_args( $args, array(
        'post' => $post,
    ) );

    $product = new WC_Product( $args['post'] );

    if ( wc_tax_enabled() && ! wc_prices_include_tax() ) {
        printf( '<p class="tax"><span class="label">%1$s:</span> <span class="amount">%2$s</span></p>', __( 'Tax', 'frb'), wc_price( WC_Tax::calc_tax( $product->price, WC_Tax::get_rates() )[1] ) );
    }

}

add_action( 'tokopress_wc_product_calltoaction', 'frb_the_tax_price', 20 );