Two years later and TT has the same issue - counts mortgage interest in both places - on 1098 and Schedule E and adds them together on Schedule A. Every year I have to manually adjust the forms because I think the way the questions are asked and how the forms get filled out is incorrectly calculated.
The other part that is really confusing is TT asks how many days I rented the single bedroom in my primary residence. It turns out 18% of the year I didn't rent the room and 82% of the year I rented the room. And the bedroom is 25% of my bedrooms total. So, do I get to deduct 82% of the mortgage interest or 25%? Well I think the answer should actually be (.82 * .25 = .21) of the total interest paid for the entire year but there is no form that asks both questions.
