Final answer:
Homeowners may deduct interest on up to $750,000 of acquisition indebtedness for mortgages obtained in 2020.
Step-by-step explanation:
For mortgages obtained in 2020, homeowners may deduct interest on up to $750,000 of acquisition indebtedness. The correct option to fill in the blank is c) $750,000. This limit on mortgage interest deduction is part of the Tax Cuts and Jobs Act of 2017, which reduced the previous limit of $1 million to $750,000 for mortgage debt incurred after December 15, 2017. It's important to note that the limit applies to the total amount borrowed for acquiring, constructing, or substantially improving a taxpayer's primary or second home.