1. When did you acquire this property? To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located.Complete a homestead declaration form. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. 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. Available forms of HOMEOWNER'S EXEMPTIONS on CAA e-Forms Service Center. Once completed, note the SST number and come into our office to finish the process.