Credit card to pay for TurboTax download

I cannot understand why INTUIT requires a US Billing address on a credit card to pay for the software download. I have lived abroad for almost 40 years and file my taxes every year via TurboTax. My bank and the US government have not problem with my foreign billing address. However I need to "use" address and a credit card of a family member in the US to be able to download the software.

I would request that you fix this shortcoming ideally, or at minimum explain why this restriction is in place.

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