Hi,
That's actually not possible to get either display. HikaShop doesn't display any row for the taxes when the tax rate is 0%.
Luckily, I know that you had another subject about how to display a row for when there is no taxes (
www.hikashop.com/forum/taxes/890300-chec...n-t-show.html#270024
). Please make sure to mention these crutial details next time.
So it's normal that it displays only IVA. That's the translation you have in your italian translation file for the translation key TAXES that you're using in the custom code that you added. So just change that text by another one with a translation override of that translation key.