Here is my assessment of the problem: if you indicate that the 1098 is a refi, you are never prompted for the original loan date. TT asks “when was this loan issued to purchase your home.” If you enter the refi date (in my case 2020), TT uses that date to determine the interest cap of $750k. If you try to back date the loan to the original loan date (2014) TT zeros out the deduction altogether. I haven’t paid attention to this in prior years, but I double (actually a dozen times) checked the math and realized the issue in the current version…
