Form 2848, Power of Attorney and Declaration of Representative PDF Form 8821, Tax Information Authorization PDF Form 4506, Request for Copy of Tax Return PDF Circular 230, Regulations Governing the Practice of Attorneys, Certified Public Accountants, Enrolled Agents, Enrolled Actuaries, Enrolled Retirement Plan Agents, and Appraisers before the Internal Revenue Service PDF Publication 216, Conference and Practice Requirements PDF Publication 947, Practice Before the IRS and Powers of Attorney Related The Centralized Authorization File (CAF) - Authorization rules
