As previewed in this summer's academic instruction implementation guidance (pg. 3), our office recently removed the no-credit option (NC/audit) from CU Boulder Class Search and Campus Solutions self-service.
Under the new process, students wanting to take a class for no credit must first register for the class, then submit an requesting a change to no credit. Existing processes for community and senior auditors are unaffected.
The deadline to submit a Fall 2020 no-credit request is Friday, Sept. 11 (prorated for special sessions). For details, see the no-credit section of the Edit Your Class Options student page.