Deductions & credits

It still is not the correct way to calculate the average principle balance, per https://www.irs.gov/pub/irs-pdf/p936.pdf

 

Any ways, why should we use a calculator for a web-based app in 2021? the entire idea of TT is for it calculate things correctly.

 

The workaround is sloppy, incomplete and inaccurate.  It probably has cost people money.