Complete a homestead declaration form. Sign your declaration in front of a notary.To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. For more information click here. 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. Filing a homestead declaration creates a legal barrier that shields up to a statutory amount of equity in your home from certain creditors. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption.