ENJOY YOUR SCHOOL HOLIDAY! Classes on January 3, 4, and January 10, 2023, will still be conducted, but the business office will be closed. If you have urgent business regarding billing, please send an email to billing@ittcinternational.com  and put URGENT in the subject line, and someone will contact you. All other messages can be sent to support@ittcinternational.com and will be responded to after January 10, 2023. Please put URGENT in the subject line if you need a response before January 11, 2023.