When you get the email that says IRS has accepted your return, it means little more than they got it. Sometime later, after their computers run some checks, they may reject the return if something in your return fails to match what they expected. You then get the email that says "rejected." That happened to me last year for something relatively trivial, but nothing is trivial to a computer. Regardless, all you have to do is make whatever correction the rejection indicates, and MAIL the amended return.
