Make sure you did not enter a 1099-INT (interest you recieved) as a 1098 (interest on a mortgage).
Sign into your account and the return
Click on "Tax Tools" on the left side-bar
Click "Tools" on the drop down
Click "Delete a Form" on the "Tools Center" screen
Scroll through the list and look for Form 1098
If you have one on the list, you entered something wrong, you would only have a 1098 if you have a mortgage.
