I just had this issue, I called turbotax today and the person I spoke with was able to ask a few of their coworkers as well.
For my particular situation I had three 1098's. I was unable to unselect things as I was on the website and not using the desktop program.
I put the exact same amount that was showing in the first box (line one asking for sum of numbers from line 5a-5d, right above the box where it was asking you to input number for Sch A, 8A), and it allowed me to continue without changing any numbers on my return.
Hopefully this helps others as well!
