Property owners in Florida may be eligible for exemptions and additional benefits that can reduce their property tax liability. When to file: Application for all exemptions must be made between January 1 and March 1 of the tax year.The Pima County Assessor's Office is kicking off tax season with a library tour focused on helping homeowners lower their tax bills. Claiming a Florida homestead exemption involves some very specific requirements that must be completed within a specified time frame. To qualify, you must live in the home as your primary residence.