Before proceeding, verify you have enabled the tax calculation on your shop.
To set the taxes correctly, please refer to this page.
If you want to bypass the manual addition of the taxes, you can import all the standard and reduced, if needed, tax rates of the countries of the European Union with just one click.
Click on the button “Import standard tax rates” or “Import reduced tax rates” and the process will be automatic. It is necessary to select all the entries that have been created.