I had this problem, and here is my fix. Somehow, the software had added a blank w2 to the federal. It wasn't listed on the main page for income, I actually had to go into the option that said W2's on the long list of options at the beginning of the federal filing. Once deleted, my transfer completed. I don't know why it added a blank w2, I am certain that I didn't do it. I hope this helps someone else.
