This is a known TurboTax issue for 2021 and is under investigation. Please see the info I'm linking below to sign up for notification by email when the issue has been resolved. Thank you for your patience.
Why am I receiving an error message when I try to pay with a credit card?
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
