I think I figured out the issue with this. My first 1098 has Box 2: Outstanding mortgage principal blank so I left it blank on the TurboTax form. After going back in I figured I'd try entering $0.00 and that corrected the issue. However, there was no validation error on that form field to indicate it was incorrect and would let me pass through the form normally. Please consider adding proper form validation to this page to prevent this issue for other users.
