Questions regarding the status of your Form 2587, SEE Application; Form 23, Application to Practice Before the IRS; or Form 8554, Application for Renewal to Practice Before the IRS , should be directed to the Enrolled Practitioner Program Unit in Detroit Computing Center. Their number is 313-234-1280 or you may email them at EPP@irs.gov.  Please allow 90 days after submitting your Form 23, before contacting the Enrolled Practitioner Program Unit.