for a full year depreciation of residential real estate and the only depreciable asset is the $300200/27.5 = 10916. however the way Turbotax seems to do it is subtract prior accumulated depreciation reported from the cost. from 27.5 it subtracts the number of years depreciation that should have been taken then divides the net undepreciated amount by the remaining life
is this the first year using Turbotax? if so Turbotax has a bad habit of correcting for miscalculation in prior depreciation. here's an example put into service 1/1/2020 took only 2000 in depreciation through 2021
27.5 - .958333 -1 (years for correct depreciation 2020 and 2021) = 25.54166667
300200 -2000 = 298200
298200/25.54166667 = 11675 what Turbotax would show
too much say 50,000 in prior depreciation 300200-50000= 250200/25.4166667= 9796
so totally wrong.