Business & farm

The 4562 "regular tax" form (without AMT) with depreciation that goes to schedule E is adding the depreciation preference to regular tax MM/SL depreciation.  It does this when I override the prior total depreciation because filed depreciation for only 3 of the last 7 tax years of rentals thus entering the actual prior used being less than what TT calculates for 7 years.   Is the software correct in calculating the regular tax depreciation to include the depreciation preference amount like it does for AMT?