IRS Criminal Investigation (CI) serves the American public by investigating potential criminal violations of the Internal Revenue Code and related financial crimes in a manner that fosters confidence in the tax system and compliance with the law. Report tax fraud Identify tax schemes Report tax fraud Voluntarily disclose What we do About Criminal Investigation What we investigate Investigation process J5: Our international partnership Latest news April 25, 2024 — Tax attorneys and insurance agent convicted in tax shelter scheme April 25, 2024 — Four more co-conspirators charged in alleged nationwide abusive-trust tax shelter scheme April 25, 2024 — Dog broker sentenced to federal prison for filing false tax returns More press releases