You can use 3 methods of payment: Credit Card (Visa, MasterCard, AmericanExpress), Paypal and Skrill.
All the payment methods are the most secure, using SSL encryption, so do not worry.
We do not perceive any payment taxes. The only taxes applied are those applied by your bank, in such cases when you pay with other currency than dollars.
When a payment error occurs you should contact us and we will let you know whether or not the payment was carried off.