Beginning January 1, 2015, the EU (European Union) began charging a VAT (Value Added Tax) fee on digital goods sales.
Brooklyn Tweed pattern PDFs fall under that category. VAT fees vary by EU country and are determined based on the IP address and the address on file with your credit card or PayPal account.
Brooklyn Tweed is MOSS registered (Mini One Stop Shop) and pays all collected VAT fees to the EU at the end of each quarter.
You can avoid being charged VAT fees during the check-out process if you are VAT-registered and enter your VAT number in the appropriate field.