On our site, there's No Interstate Tax for U.S. purchases.
Our site doesn't collect any international tax at checkout. But if you're shopping from outside the US, your country may charge an import (Customs) tax on purchases from other countries. This tax may be collected from you by your government's taxation office, or they may require the shipping carrier to collect the tax on your government's behalf. Merchants have no control over any country's taxation policy. If you are unfamiliar with or concerned by your nation's import tax policies, please contact them directly.