I don't know why they make this so hard and confusing every year. Their website seems to contradict what Nodaker was told. From the NCHC.tv site (emphasis added by me):
As has been the case in past years, NCHC and School Annual Passes from previous seasons will automatically renew for the 2021-22 season on the original purchase date and at the price the subscriber paid last season. Those subscribers with an Annual Pass (NCHC or School) from last season DO NOT need to purchase a new subscription. NCHC and School Monthly Pass subscribers from last season will have their account auto-renewed as well, and start to be charged again beginning in mid-September. For any billing questions, to upgrade from a school-specific pass to a conference subscription, or to cancel your subscription, please contact Fan Support at nchctv@sidearmsports.com.
https://www.nchchockey.com/news_article/show/1178902