Hi,
Thank you for your response. I am using Woocommerce Shipping and Tax too and the price entered is excluded tax but included for Switzerland.
The problem is I just want to change how to show the tax VAT 7.7% is already in the price (only for Switzerland) at the checkout and in invoice.
So I think if you know a couple of codes to change how the tax is displayed (ex. tax included for Switzerland) at the checkout base on country (or pricing zone), that will be perfect.