Run reports from previous periods

Suggested

I recently joined a company that has completed an ERP implementation. Unfortunately the fixed assets and accumulated depreciation do not match with what is in Sage (sage fixed assets- lite depreciation) so I need to "walk it back" to a time when they did match and then bring forward and update the data. I'm trying to run a Depreciation Expense report but when I change the date to a previous year no data is returned.