The option to pay the taxes you owe from your Bank Account will come up as you walk through the "File" process. When you have completed the input for your return, click "File" on the left-hand side. TurboTax will ask how you want to pay your taxes and you will see the payment option "Withdraw the money from my bank account ". Here you will enter your bank account information and the date you would like the payment made.
If you need further assistance setting up this option, please comment below so I can assist you further.
