First time using Turbo tax-listing assets for farm/barn cost $90,455 10/01/2013. On CPA 2015 return=39 yr, Prior=2,899 current=2,320 How do I enter for 2016?

I know the barn should have been on a 20 yr schedule, but I do not know how to list it for 2016 in Turbo Tax? I do not care if I lose some of the depreciation, I just want to make sure I do not list incorrectly and cause an inquiry.