IRS Office of Chief Counsel

Overview

The Internal Revenue Service (IRS) Office of Chief Counsel in Chicago serves as the primary legal advisor to the IRS Commissioner. Located at 300 South Riverside Plaza, this office is part of the largest tax law firm in the country. Attorneys here provide critical legal guidance on the interpretation, administration, and enforcement of internal revenue laws, representing the IRS in litigation and providing legal support to various IRS operating divisions.

Legal Services

Tax Litigation: Representing the IRS in the United States Tax Court in cases involving tax deficiencies and other disputes.
Legal Advice: counseling IRS agents and officers on complex tax administration issues, including Small Business/Self-Employed and Large Business/International matters.
Guidance: Assisting in the drafting and interpretation of revenue rulings and regulations.

Visitor Information

This is a legal office for the Department of the Treasury and is not a Taxpayer Assistance Center for filing tax returns or answering general public tax questions. Access is strictly limited to legal professionals involved in active cases, government employees, and individuals with specific appointments. The building maintains rigorous security protocols, including ID checks and metal detection screening.