Investors & landlords

Sorry, but this is confusing.  The form has columns literally titled current and prior depreciation!  How is this not depreciation from current and accumulated depreciation from prior years? What do those columns mean if not total depreciation?  The prior depreciation column is also way more than I could possibly have taken in one year so I assume it is accumulated depreciation.

 

Also can you give more detail on the history part, I don't understand how to find the form and accumulated depreciation in the manner you suggest.  I always used TT ONLINE for my taxes.  Thanks!