If you click on "FORMS" in the top right hand corner, you can pull up any of them. The state forms for me (SC) are at the bottom. Another way would be to simply print the tax return. You can print anything or everything to hunt the error.
Last year I had a similar situation when I rolled a 401k into an IRA. It showed up on a 1099R and if you didn't answer all the questions correctly, it flowed into income.
Good luck
