The Homestead Declaration must be recorded with the County Recorder to be valid. To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located.If known, fill in the parcel number of the property for which you are seeking a homestead exclusion. Please fill out this Homestead Exemption Application. The new California Homestead Exemption was introduced through AB 1885 on Sept 18, 2020. The legislation will take effective on Jan 1, 2021. Download PDF BOE-266 REV. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. If you qualify all you have to do is file an application with your local county office.