2 multifamily units in parcel

I own 2 multifamily units with one having the main address and the other is unit b on the same parcel of land. I rented unit b in 2023 and the main address house in mid 2024. They share a common driveway, have separate electric meters which tenants pay for but share multi family water meter that I pay as the landlord. Turbo Tax points to enterprise designation also but I am not sure how to use that for the rental properties. How would I account for the cost basis, depreciation and property taxes on the 2 units.