To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. If you want a Homestead Declaration on your property, you can do it yourself.Complete a homestead declaration form. This form is used to apply for the Homeowners' Property Tax Exemption in California. Online: Go to Homestead Tax Credit Eligibility Application page, and complete the online form. Filing an online application will be faster than mailing one in. The Homestead Declaration form serves as a critical tool in protecting homeowners' equity from involuntary claims in the state of California. In order for a property owner to qualify, the owner must file an application with the Montgomery County assessment office and be approved. Property taxes are one of the oldest forms of taxation. 0117). How to Apply for the Homeowners'. Exemption.