A homeowners' exemption may also apply to a supplemental assessment. For more information, call (925) 313-7481.Homeowners should contact their county assessment office (position 48) for a copy of their county's homestead and farmstead application form. This claim may be used to file for the Homeowners' Exemption for the Assessment Roll and the Supplemental Assessment Roll. To qualify for the homeowners' exemption, the home must have been the principal residence of the owner as of January 1 of that tax year. To receive a homestead or farmstead exclusion, a Pennsylvania resident must submit an application to the county assessor prior to March 1. If known, fill in the parcel number of the property for which you are seeking a homestead exclusion. Download PDF BOE-266 REV. A homeowner can only have one homestead exclusion. We're more than a battery store – Batteries Plus is here for you.