Sorry to compound my answer:
If you calculate a percentage of
750,000 divided by Average Principal Amount Outstanding during 2020 = Percentage Deductible
Multiply Percentage Deductible by Total Interest Paid, this amount be amount on Schedule A, or at least close.
Average Principal Outstanding is 1/1/2020 Principal Outstanding plus 1/1/2021 Principal Outstanding divided by 2.
Example :
750,000 / 926,000 = 80.994%
