Under the new rules for depreciation under the Tax Cuts and Jobs Act, we can now take section 179 on nonresidential real property. This includes Roofs. I entered the asset with the 39 year life and took the section 179. Lacerte is giving me a critical diagnostic: Depreciation asset #: Invalid method for section 179 expense. Do I ignore the diagnostic and file the return as is or do I change the life to a method that is valid?