T-MAN, E.G. is an acronym for Taxpayer Identification Number (TIN) Manager, which is a job title used by the Internal Revenue Service (IRS). The two crossword solutions, FED and AGT, are abbreviations for Federal Employee and Agent, respectively. FED stands for Federal Employee, which is someone who works for the federal government, while AGT stands for Agent, which is someone who is authorized to act on behalf of the IRS.