Florida Dept. of Revenue - Florida Dept. of Revenue Florida Department of Revenue - The Florida Department of Revenue has three primary lines of business: (1) Administer tax law for 36 taxes and fees, processing nearly $37.5 billion and more than 10 million tax filings annually; (2) Enforce child support law on behalf of about 1,025,000 children with $1.26 billion collected in FY 06/07; (3) Oversee property tax administration involving 10.9 million parcels of property worth $2.4 trillion.