Hello, there seems to be a glitch in the 2023 TurboTax Deluxe Desktop Download version for Mac. The software doesn't allow you to enter your mortgage interest as a home office expense. It is locked at $0 and you're unable to change it in EasyStep or override it on Forms. You can only add it as a direct expense (when it's supposed to be an indirect expense).
If you try to separately add it on the Deduction tab (for Form 1098), it doesn't read it as a deduction and doesn't apply it to your Schedule A.
References: IRS Form 8829 instructions (https://www.irs.gov/pub/irs-pdf/i8829.pdf) as well as TurboTax's page on Form 8829 (https://turbotax.intuit.com/tax-tips/small-business-taxes/what-is-irs-form-8829-expenses-for-busines...) both instruct you to multiply the mortgage interest by the percentage of your home that is dedicated exclusively to your business and then claim the rest on Schedule A.
