Can't get TAX working in Magento

Question

I'm trying to set my TAX rate to 21%. But the front-end calculates 0%.

Does anyone knows what I've forgotten here?

note: BTW is the translation of TAX

Answer 1

You must also set the Origin in Shipping Settings:

Also, check if your products have VAT Class: Taxable Goods (edit the product, Prices Tab):