An unexpectedly high number of PTIN renewals last week resulted in processing slow-downs, timeouts and inaccessibility for those attempting to renew online. The IRS apologizes for any inconvenience and believes most of these issues have been resolved. If you were unable to register or renew your PTIN last week, please try again. The IRS also suggests practitioners try to avoid peak hours, which are 1 p.m. to 4 p.m. EST. If you are trying to register for the first time, the system supporting new PTINs will be unavailable from 3:30 p.m. Saturday until 8 a.m. Tuesday for maintenance. Renew your PTIN here.