Investors & landlords

Hi,

I am using 108,000 as the cost basis for the house. The 3.636%  puts my depreciation at 3,927, just below what TT calculated last year which was 3,984. When I put the same numbers in property of 108,000 land 27,000 and last year's depreciation, TT says my depreciation is 3,065. I do not understand why, or what I need to do to fix.  

Thanks,