Deductions & credits

  1. If you sold a home and paid off the mortgage and purchased a new mortgage Box 2 for the mortgage you sold should have the balance as of 1/1/2021 in Box 2 and the loan date in Box 3.

 

This doesn't seem to be correct imo. Let's say you have 2 loans

Old one: principal 750k interest 10k  (close in July)

New one (open in July) principal 1.5M, interest 20k 

I believe the correct math here should be 10k + 20k * 750k/1.5m = 20k 

but if you type 0 for box 2 you will end up getting 30k deductible interest which I don't know if IRS would like to see that