After you file

How are you going to pay the tax due?  There are several ways.  You could include a check with your return.  If you want to pay by credit card there is a 3rd party fee.  See

https://www.irs.gov/payments/pay-your-taxes-by-debit-or-credit-card

 

There is no extra charges or fees to pay the Turbo Tax fee by credit card.