You will, of course, have to pay for TurboTax up front using a credit card.
The seemingly obvious choice of "set up a payment plan" doesn't apply here.
I propose choosing "Pay By Check" and then ignoring the check voucher as a way to complete the filing electronically but still allowing the user to adjust their payment plan manually.
Nothing, you cannot select a payment choice in TurboTax. The protocol, if you owe taxes again, is to call the IRS customer service line at 1-800-829-1040 and ask them to add to your current plan. I would recommend you do that before sending in your return or as soon after.