Only one senior need apply for the senior exemption, but all members of the household must include their income and social security numbers. If, as a new owner, you want to receive a Homestead Exemption in Miami-Dade or Broward County, you must apply before March 1st of the following tax year.The deadline for filing for exemptions is March 1st. Exemption forms are available from the Miami-Dade County Property Appraiser's Office. 9. Useful information regarding exemption homestead and agricultural exemptions for Miami-Dade and Broward County. For homeowners in MiamiDade County, the Homestead Exemption is a gamechanger. The homestead property and up to five acres will be exempt from school tax. In order to be eligible, the applicant MUST reside in the home and have a homestead exemption on the property.