The Homestead Exemption reduces the taxable portion of your property assessment by $40,000 (starting for 2019 Real Estate Tax bills) if you own a home in Philadelphia and use it as your primary residence.
You can fill out the online application, or print one of the application forms and send them by mail to:
City of Philadelphia
Department of Revenue
PO Box 52817
Philadelphia, PA 19115
If you no longer qualify for the Homestead Exemption you must file the change/removal form.