The Depreciation Summary consolidates certain depreciation information and reports it by the specific form where the depreciation is used. For example, if you have more than one business or investment activity using depreciable assets, the Depreciation Summary will sort the assets entered on various Depreciation Worksheets and report:
which assets were used with which activity
the date placed in service for each item
the basis for each item
the allowed depreciation for each item
the total depreciation expense for that activity
Note: The Depreciation Summary doesn't report the expenses related to the depreciation of business vehicles or the section 179 election you made this year. Such amounts must be added to the specific form subtotal reported on the Depreciation Summary to reconcile that total with the depreciation reported on the specific form.