Are you trying to pay your tax or your TurboTax fees?
The temporary or pending transactions are not actual charges. They should disappear in a few days if they are not confirmed. So I wouldn't worry about them unless they actually get posted. But I wouldn't keep trying to use that card.
I'm not sure why a particular credit card can or cannot be used overseas. Try using a U.S. credit card that cannot be used overseas. If you're paying your TurboTax fees, I'm pretty sure that TurboTax processes it as a transaction in the U.S., even though you are not sitting in the U.S. when you enter it.
