Information For...

For you and your family
Standard mileage and other information

Forms and Instructions

Individual Tax Return
Instructions for Form 1040
Request for Taxpayer Identification Number (TIN) and Certification
Request for Transcript of Tax Return


Employee's Withholding Allowance Certificate
Employer's Quarterly Federal Tax Return
Employers engaged in a trade or business who pay compensation
Installment Agreement Request

Popular For Tax Pros

Amend/Fix Return
Apply for Power of Attorney
Apply for an ITIN
Rules Governing Practice before IRS

Circular 230 Tax Professionals

Circular 230 (Revised 6-2014) (PDF)

Regulations Governing Practice before the Internal Revenue Service

The Office of Professional Responsibility (OPR) At a Glance

A glance at OPR, its mission, and priorities

OPR Webinar Information

The Office of Professional Responsibility (OPR) webinars cover tax practice regulations, diligence obligations and professional responsibilities for tax professionals.

Frequently Asked Questions

OPR: Frequently Asked Questions (FAQs) regarding OPR and Circular 230 Tax Professionals

Subscribe to News and Updates from OPR

Subscribers will be notified by e-mail of current and up-to-date news and information

Speaking Engagements

Request a speaking engagement

Information for Tax Professionals

OPR and Other IRS Related Issues

Disciplined Practitioners

Disciplinary Sanctions - Internal Revenue Bulletin, Guidance on Restrictions during Suspension or Disbarment, OPR Case Dispositions, and Search for Disciplined Tax Professionals

Latest News and Guidance from OPR

The latest news from OPR