First-time Homestead Exemption applicants and persons applying for the Homestead Assessment Difference (Portability) can file online. The Property Appraiser mails Homestead Exemption application forms and qualification guidelines to persons who bought homes during the current year.There are no income and homestead value limits for categories 4V, 4S, 5, and 7. The. The deadline for filing for exemptions is March 1st. Exemption forms are available from the Miami-Dade County Property Appraiser's Office. 9. Property owners in Florida may be eligible for exemptions and additional benefits that can reduce their property tax liability. Homestead exemption applications must be filed annually between February 2 and June 30. Application forms are typically available beginning February 2. You must file the application (Form 458) with the county assessor's office where the original home resides between February 2 to June 30. 300 NE 80th Terrace 2nd Floor, Miami, FL 33138.