The 2020 TT mis-calculates the average mortgage values and results in errors on deductibility of mortgage interest. I have had my original mortgage sold and refinanced three times in 2020, and I have three 1098s. The original loan was greater than $1M. After I enter the 1098 values, including origination dates, TT adds the the value of all the loans at original value (Box 2) instead of averaging them over the period for which they were held during the year . From the work sheet it appears TT incorrectly states each loan is outstanding for the full 12 months, despite the fact that I entered shorter periods of time for each loan.
