If we’ve notified you that one of your colleges participates in the IDOC Service, visit IDOC to get started on your submission. If you have additional questions, you can email us or reach us by phone at 1-866-897-9881. Customer service representatives are available between 9 a.m. and 6 p.m., Eastern time. Extended service hours from 8 a.m. to 10 p.m. are available from January through April. Hours are subject to change.