The annual exemption filing deadline is February 15. For more detailed information on Exemptions, please see the Exemptions pa ge of this web site.To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. If you move, you must file an application for a new exemption. For more information about the Homeowners' Exemption, call (916) 875-0710. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. Homeowners should contact their county assessment office (position 48) for a copy of their county's homestead and farmstead application form. To obtain an application for either exclusion, call (916) 874-5899. The State of California (not the Assessor) has developed two Property Tax Assistance.