I have the same issue as justin-andes. I am a CPA. Over 2020 my home at various times had three mortgages, but only one at a time. At no point was the balance over 750,000. When I followed these instructions from the employee tax expert, the program was still summing my outstanding balances in box 2 to limit my interest deduction. I proved this out by agreeing the ratio of of (loan A box 2 +loan B box 2 + loan C box 2) / 750,000 which matched perfectly the ratio of (loan A box 1 + loan B box 1 + loan C box 1) / deduction allowed by turbotax. A second weakness in the solution proposed there is that selecting on the first loan that it was not a refi would not allow acceleration of any non-amortized points from that loan, which should all accelerate into the current year if that loan was refinanced, but the acceleration is only triggered if you select the radial button saying it was refi-ed or paid off in the current year.
