Pennsylvania law allows IRC section 179 expenses, in effect on Jan. Section 179 is part of the tax code that allows businesses to write off purchasing equipment used for the company.The § 179 Deduction is a business expense. Description: This document amends Philadelphia tax regulations. Activity, including the partial or complete liquidation or sale of business assets, or making sales to persons within the City of Philadelphia. This item addresses how S corporations and partnerships that have a Sec. 179 recapture event should report the event to their owners.