Investors & landlords

Let me clarify.  The rental property was purchased in 2012 and has been used as investment property since then. We have been depreciating the property since that date and on prior years tax forms we were receiving $6,478 in depreciation on the property each years.  I'm filing this years  taxes (2019)  and Turbo Tax for Home & Business asks my costs for acquiring the land and building and when I acquired it, so I entered the acquisition costs as of 2012.  I'm getting prior depreciation amounts from 2017 Tax form 4562.  So, each year since the acquisition I have received depreciation, but this year it's telling me depreciation is $0 which makes no sense if the building is being depreciated over 27.5 years.  Clearly, confused.