You do not pay "through TT"---TurboTax does not handle your payment for you.
If you have federal tax due you can pay by mailing your payment with the 1040V voucher, (which has the address printed on it, having the payment taken out of a designated bank account, or you can pay directly on the IRS website.
https://ttlc.intuit.com/community/tax-payments/help/how-can-i-pay-my-federal-taxes/00/26212
To apply for a payment plan with the IRS
Apply Online for a Payment Plan
You must pay your state tax due using the state’s preferred method of receiving payment. For most states that will be by making a payment to the state’s own tax website, or by mailing a check or money order.
https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue
Yes, the federal taxes owed can be paid by direct debit from your bank account. Some states allow direct debit using tax preparation software, but not all.
In the File section of the program on Step 2 you will be given several options on how to pay any taxes owed.
You can also use the IRS payment website for payment of federal taxes owed - https://www.irs.gov/payments