Ok ... this is not the end of the world. First print, ink sign and mail in the return asap ... do not worry that it has a balance due on it because it should even if you already paid it. Then wait ... the IRS will catch the payment and marry it to the return automatically. They may send you a late filing penalty letter ... again don't panic. Respond to the notice requesting an abatement of the penalty by simply stating you didn't realize the return did not go thru electronically ... this was an unintentional error and it will not happen again.
