Hi, all.
I had a sale of rental property in 2013. In regards to this, how is the line 22
(Depreciation allowed) of form 4797 calculated? Is this simply an addition of allowable depreciation from all the previous years?
I had this property for last 6 years and for first couple of those 6 years, I did not claim depreciation on Schedule E. Does this affect what I put on line 22(4797)?

Thank you very much in advance