The in-service date will be the first day it was available for rent, September 15.
All the expenses you had before it was rented should be capitalized, either added to the rental property's basis, or put in a separate category, like "Start-up Costs".
To get to the capitalize-depreciate section:
1. Click Federal
Taxes across the top.
2. Click Wages
& Income across the top.
3. Click I’ll
choose what I work on.
4. Scroll down to Rental Properties and Royalties.
5. Click Start
or Update by Rental Properties and Royalties (Sch E).
