Florida Fact Information Sheet Individual (IFISI) is a form issued by the government of Florida, specifically the Florida Department of Revenue, that provides taxpayers with a summary of their tax liability and tax return information. It is a compilation of all relevant facts about a taxpayer’s filing status, income, deductions, credits, and taxes due. There are two types of IFISI forms: the annual version, which is issued for the current tax year, and the amended version, which is issued for prior tax years. The IFISI form is used to ensure accurate filing of tax returns and to assist taxpayers with filing their taxes in a timely manner.