@DaveF1006, I wasn't able to follow these directions for two reasons:
1) There isn't anywhere to mark the original mortgage balance at all, so I couldn't enter $0
2) For the second home, I couldn't enter $0 for outstanding mortgage principal (Turbotax won't let me put 0 in there) and nowhere that I saw to mark it as sold
Because of this, I think I have to go with the method of adding all three 1098s together, which is still incredibly confusing to me as to why that would be, but I don't see any other way around it. It still feels like I should be combining the primary home 1098s into one and separately filing the second home (with what is on the form I got, which would show outstanding principal, but from everything I'm reading on this thread, it doesn't sound like that is correct either.
