Too late now, last night I called TurboTax, and an "Expert" answered that did not know the answer to why there was not an option to enter the payment date using a credit card. She in turn called a "Manager" who told her there was no payment date selection on the credit card payment option. Since this was the answer I received and I have worked with TurboTax "experts" before who do not go above and beyond what's in front of their noses, I decided to file using the "debit my checking account" option which does provide a payment date option.
Of course, now that my taxes are filed I can't verify that your directions are correct since I can't simulate filing my taxes again.
