First NEVER wait until the last minute to do anything ... if you could not file by the 15th you should have put yourself on extension and the TT program does support efiling of that form. And if you could not figure out how to do it or it was rejected you still had 3 days to mail in the form. Also if you will not have a balance due on the return the extension is not even needed. If you will have a balance due then filing the extension without a payment would only give you more time to file but not time to pay.
