When you use WooCommerce, you can update quite easily shipping costs and taxes for your different shipping costs with the back-office.
The problem is that in the front-office, customers don’t see any details about the tax of your shipping service when they are on the Cart page and Checkout page.
This code is quite simple and you can add it through a new plugin or into your functions.php into your WordPress theme.
This is a code to add :
The goal is simple: We rewrite the shipping part with the hook woocommerce_cart_shipping_method_full_label
As you can see, the $label value is replaced by a new one. The old one is now in a commentary. This new one includes the price with and without taxes. If you want to change how it is displayed, you have to update this line :
$label .= ': ' . wc_price( $method->cost ) . ' ('. wc_price( $method->cost + $method->get_shipping_tax() ) .' incl VAT)';
Your pages will look the same as below:


And it’s done, customers can now see VAT details about the shipping!