As a senior in Arizona, you may be eligible for a Tax Freeze on the taxable market value of your home. This includes Phoenix's active adult communities.Application deadline date is September 1st of the current year. Exemptions can reduce the taxable value of the property. You may file up to 4 exemptions. The property owner must be 65 or older. Senior Citizens Homestead Exemption. Application for Property Tax Exemption. To establish eligibility for property tax exemption, the claimant must sign and file an affidavit with the County.