I'm having the same problem with the mortgage interest deduction limit. Since I bought and sold a home in 2020 I have two 1098s from the different lenders and like all of you TurboTax isn't figuring the average mortgage balance like the Pub 936 worksheet allows us. (It's just adding the 2 mortgages). Maybe a workaround would be for TT to allow us to OVERRIDE the incorrect balances on the worksheet using the instructions from IRS Pub 936. This TT error would have cost me thousands of dollars I hadn't "caught" this error. Hope the coders can get this fixed soon.
