Well, I am experiening similar trouble. The tax is all setup correct (at least, according to three different websites) and the link provided by Iorro. Somehow, the web shop simply shows VAT (not the Dutch equivalent BTW) 0.00.
Our website can be fount at: https://www.projecth.nl/shop/
It is driving me nuts, I just cannot stand it is not working properly.
I am not sure if it has anything to do with it, but in my online shop, tax rates are shown with a comma (,) as a decimal separator, and not a dot (.) as shown in the screenshots in the instructions.