Value Added Tax is a tax that is required to be paid by consumers that live within the European Union(EU.) Since airProfi - sklep lotniczy nie tylko dla pilotów is based in the Polska, the VAT applied to our goods is 17.5%. If you DO NOT live in a European Union member country you DO NOT have to pay VAT.
The simplest way to be sure that you are viewing the price that would apply to you is to create a member account. Once you create an account with your correct address information, all you have to do is log into your account when you visit the store and you will automatically be shown a price inclusive or exclusive of VAT, depending on your country of origin.