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 March 1, 2021 — FCA US LLC pleads guilty to making illegal payments to UAW officials March 1, 2021 — Additional charges brought against Clinton man and Fitchburg man March 1, 2021 — Dallas tax preparer sentenced, ordered to pay $11.9 million for filing fraudulent tax returns More press releases