The last day to file is September 1st of the current tax year. Why did I receive my organizational exemption application back?This comprehensive guide delves into how the Act not only safeguards your home's equity but also plays a pivotal role in scenarios like divorce and bankruptcy. Do you want to know about the Arizona homestead exemption? You may need to record a Declaration of Homestead. 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 Arizona Department of Revenue (Department or ADOR) administers the property tax system in cooperation with the 15 county assessors, among others. First Monday in January through Last Day of February. First-time applicants must apply in person.