Thank you for your quick response. I have desktop version and had previously tried everything you suggested (deleted, save, close, restart). After several hours of frustration, I was just about ready to print the return and mail it in, but then I just kept hitting the "transmit" button over and over again ignoring the error. Finally, to my surprise, after about the 10th try, the file said "transmitted"!. I also received email confirmation that IRS received E-file.
