Once completed, use these instructions to submit your application. ​. This video guide provides step-by-step instructions on how to file an application for a rebate of Pennsylvania property tax or rent paid.Half of Social Security income is excluded. Download and complete an application form, including the section on household income. Learn about programs that may help to reduce or eliminate your Allegheny County property tax bill. Act 77, Senior Tax Relief, entitles qualified senior citizen homeowners to a discount on the real estate tax of their primary residence. Applying for a Tax ExemptionComplete the Tax Exemption Application and make 6 copies.