Value Added Tax (VAT) is a general consumption tax assessed on the value added to goods and services.
Always ask for a receipt when purchasing or renting items through out many countries, you may be able to claim the tax back when you get to the airport to come home.
According to eurunion.org the minimum rate will be 15% in EU countries, it will prob vary depending on the country your in.
Ask the mechent about the VAT, and and allow for extra time at the airport to benifit from this. Inquiring at the customs/tax office in the airport when you arrive is also a good idea
Hope some peps can benifit from this info....