The fastest and the hardest. I do have my receipt from the post office, but the thought of trying to convince the IRS that I did everything properly and on time, and the post office dropped the ball doesn't thrill me. I suppose it's what I get for clinging to paper mail in a digital age, but I'd just rather work with a hard copy. Thank you for taking the time to post an answer. There are times when having a Plan B isn't such a great idea. This is, apparently, one of them.
