If this was a typical grantor trust that became irrevocable on the death of your mother-in-law, then you would use a stepped-up basis with the fair market value of the property on the date of death being the new basis for depreciation. The recovery period for residential rental property would be 27.5 years.
I'm not sure about the Business product, but the initial trust return would have a beginning date in November of 2024. However, if you entered an earlier initial date (e.g., 1/1/2024 or earlier), then the program is probably calculating a full year of depreciation.
I'm sorry for your loss.
