How to contact HiSET support

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You can contact HiSET® Customer Support at the following toll-free phone number:

1-855-MyHiSET (1-855-694-4738) – available Monday through Friday from 9 am to 7 pm ET

For test-day issues, you can call 1-800-257-5123 option 4

Email:HiSET@ets.org

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