Application deadline date is September 1st of the current year. The application deadline for filing is September 1.You can download the application from the Assessor's Office for from this link, Form DOR 82104. The property owner must be 65 or older. It involves completing a form and submitting it to the county recorder's office. To qualify, you must live in the home as your primary residence. The dwelling may be a house, condominium, or mobile home. The Department recognizes three categories of property tax exemption: General. Restricted, and Individual. If you're over age 65 in Arizona and are on a fixed income, you may be eligible to significantly reduce your property tax bill.