To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. Buy a declared homestead form from an office-supply store, or download a form from the Registrar-Recorder's website.Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. Complete a homestead declaration form. Before you use this form, fill in all blanks, and make whatever changes are appropriate and necessary to your particular transaction. Consult a lawyer if. You must also file the appropriate exemption claim form with the Assessor. There are two, basic, alternative ways that persons qualify for this exemption: There is no charge for filing for the Homeowners' Exemption.