What is the deadline to file for exemptions? Here's the deal: you can apply for Homestead Exemption between January 1st and March 1st.The deadline to file is March 1st. It is best to just apply as soon as you can after closing. Deadline for filing Homestead Exemption and Agricultural Classification. Apr. 01. Deadline for filing Tangible Personal Property return (form DR405). Jun. 01. The timely filing period for Homestead Exemption for 2021 is March 3, 2020 through March 1, 2021. The filing deadline is March 1, of tax year. 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.