Add an informative custom message in Woocommerce Checkout page
You could display it as a Woocommerce "success" notice in checkout page, this way:
add_action( 'woocommerce_before_checkout_form', 'print_donation_notice', 10 );function print_donation_notice() { wc_print_notice( sprintf( __("%s 3%% of this order will be devolved for charity associations, so an amount of %s.", "woocommerce"), '<strong>' . __("Information:", "woocommerce") . '</strong>', strip_tags( wc_price( WC()->cart->get_subtotal() * 0.03 ) ) ), 'success' );}Code goes in function.php file of your active child theme (or active theme). Tested and works.
