Actually, I belatedly realize that there are TWO 4562s under my Forms.
The first is relevant if the filer is subject to the AMT and in that case apparently prior depreciation for the Residential Property category (27.5 years) appears blank.
Scrolling down a few lines one finds the regular 4562 when the AMT is not applicable. THAT version of the 4562 does include prior depreciation figures for Residential Property.
