Lucho, See: http://www.irs.gov/Tax-Professionals/Enrolled-Agents Keep Your Contact Information CurrentIf your contact information has changed since the time of your last renewal, please notify us by fax or mail your address change to: Office of Practitioner Enrollment P.O. Box 33968 Detroit, MI, 48232 OR Fax: (313) 234-1622 Please include your name, prior contact information, new contact information, social security number or tax identification number, and the date.