How to deduct proper mortgage interest for Airbnb Room in a house

[jptalledo]

Hi

I rented a bedroom of my home using Airbnb. I am planning to use Schedule E, but TurboTax does not ask me about how big is the area/room for this rental.

To deduct the home mortgage interest, it uses the total of days rented and the personal day use. So, should I put only the mortgage interest percentage of the area used for Airbnb and then TurboTax calculates the split between rented/personal use?

[PaulaM]

Under the property profile section of the rental section, indicate that you rented part of your home. Personal use days refers to any days that you personally used the room. If it simply was not rented certain days, then enter 0 for personal use days. Then TurboTax can do the math based on the rental use % (you can use the sq. footage).  If you did have a combined use of the room, then you have to complete your own allocation of expenses.

[mrmoppel]

I'm having the same problem, but this response doesn't quite solve the issue.

Similar to the OP, we're renting one bedroom in our condo. For simplicity, let's say the room was rented 180 days with no personal use (so I'll put personal use days as zero).

Now, how do I indicate that just one of two bedrooms was rented when entering expenses like mortgage interest or property tax so turbo tax can "do the math"?