It sounds like you are running into some issues when attempting to pay for TurboTax.
I recommend verifying that all of the associated information you are entering with the credit card is accurate as the card issuer has it on file, especially the billing address. You can also verify that the CVV/CVC code is correct which is a three digit code on the back of your card (4 digits for Amex).
Also, the billing address on your credit card and the mailing address on your tax return have to match or you will get an error for paying with a credit card.
If they are not the same, change your mailing address to match your billing address:
- Click on My Info on the left side of the screen. Edit your mailing address and Continue.
- Go back to the File section to make your payment.
After the payment has been approved, go back to My Info and change the address back to the original.
Hope that helps!