OK ... when you place the rental into service the depreciation starts. Residential rentals are depreciated over 27.5 years no matter how old the building is or how long you owned it before it began being a rental property. Depreciation is required ... it is not an option. Follow the TT interview screens carefully to get this entered correctly ... FYI the depreciation section (form 4562 ) will not be functional until mid January.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/irs-forms-availability-table-tu...
