You can file a declared homestead by taking these steps: Buy a declared homestead form from an office-supply store, or download a form from the Registrar-Recorder's website. Fill out the form. Sign the form and have it notarized.
The home must have been the principal place of residence of the owner on the lien date, January 1st. To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located.