Go to www.irs.gov and set up an account. There some hoops to jump thru to establish your ID. After that, logging is if fairly easy with 2-step authentication. In your account, you may see an amount due of $0 if IRS has not processed your return. You can click "Make Payment" and it will give you the option to make your payment that you expect to be due on your return and select the direct from bank option. You could try setting up an account with your state as, and they may let you make a payment online for an unprocessed state return as well. Good luck!
