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 June 6, 2023 — Mexican national sentenced for COVID-19 related fraud and identity theft offenses June 6, 2023 — Two Norman residents sentenced for conspiracy and aggravated identity theft June 6, 2023 — Man admits he caused thousands in losses to IRS More press releases