File Online for Homestead Exemption Reduction. Homestead exemption applications must be filed annually between February 2 and June 30.Application forms are typically available beginning February 2. To qualify for Homestead Exemption (F. No information is available for this page. Here are some of the important tax exemptions you should know about if you own a home in Nassau County. The Basic STAR Exemption is for all homeowners, regardless of age. The social security number will be used to verify taxpayer identity and homestead exemption information submitted to property appraisers. Continued on page 2. How do I apply for Homestead Exemption?