The Homestead Exemption reduces the taxable portion of your property assessment if you own your primary residence in Philadelphia. Homeowners should contact their county assessment office (position 48) for a copy of their county's homestead and farmstead application form.Residents interested in signing up for the exemption can visit the virtual Philadelphia Tax Center or call 2156869200. Fill in the address of the property for which you are seeking an exclusion. 3. Check out your county tax department or state tax website for more information, including a homestead exemption application form.