To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. Please note that due to Proposition 19, there is a new form available for Base Year Value Transfers for Homeowners Age 55 Years or Older.To qualify, seniors generally must be 65 years of age or older and meet certain income limitations and other requirements. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. RP467K2 (Fillin), Instructions on form, Application for Partial Tax Exemption for Long Time Senior Citizen Residents in the City of Buffalo. Additional Low-Income Senior Exemption: Filing period is January 1 through March 1 of each year. Download and complete an Application for Homestead Tax Deferral (Form DR-570).