Cares Act changes depreciation to 15 years on Qualified Improvement Property but when click that box to activate apply 15 year recovery period to qualified improvement property, it allows for entry of Special Depreciation Allowance, but when enter an amount under special depreciation allowance, no additional depreciation is taken.   Appreciate it if you can please inform how to obtain additional depreciation allowance for 2018 assets if filing under 2019 tax returns.