The Homestead Exemption reduces the taxable portion of your property assessment if you own your primary residence in Philadelphia. To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located.Everyone must complete pages 1-3 of this application. We will let you know if you need to fill out any of the application supplements . Property tax bills are going up for many Philadelphians. Here's how to access new tax relief measures. Therefore, when completing a PA personal income tax return, PA-40, military taxpayers should not include military pay earned outside Pennsylvania on Line 1a. First, you will be prompted to enter your physical address or your Office of Property Assessment (OPA) number. HOW TO APPLY: You can apply for the Homestead Exemption online using the Philadelphia Tax Center (must have an account). Did you make online, catalog, or out-of-State purchases?