To order directly from TT you must use a US CC with a US billing address. If you do not have one of those you may try getting the program from an authorized reseller that can accept overseas payments ( for probably less) . But beware of "too good to be true" prices or unauthorized resellers as they have pirated programs that could contain spyware, malware or worse.
This link Where can I obtain authentic TurboTax software? has a list of authorized TurboTax resellers.
