I had the same problem. The credit card answer you received was BS. The situation that I had was they wanted to take the $40 out of my refund from federal and send me the leftover. I backed up and changed to e-file federal first alone. Then there was no refund for them to take $40 from. Then i backed up again and filed the state return. Then the option to use my credit card appeared because there was no refund to steal an extra $15 from. Used my credit card to finish the transaction. Done. Screw you TurboTax!
