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Internal Revenue Service (IRS)

The Internal Revenue Service (IRS) administers and enforces U.S. federal tax laws.

Contact the Agency or Department

Website: Internal Revenue Service (IRS)

Contact In-Person: Find a Taxpayer Assistance Center Near You Taxpayer Advocate Service

Address: 1111 Constitution Avenue, NW
Washington, DC 20224

Phone Number: (202) 283-1710

Toll-free: (800) 829-1040

TTY: (800) 829-4059