You must e-file by midnight in your own time zone. Nothing like cutting it down to the last second. If the IRS rejects it, then you have until the 20th to fix it and re-file. After that, you have to use desktop software to work on it and it has to be printed, signed and mailed.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
