If the change happens prior to the start of the semester, contact the Registrar’s office to be listed as the instructor for the course in Banner. A new course will be created for your CRN automatically, and students will be enrolled in it.
If you are taking over for a course mid-semester, have the original instructor (or the department chair, if the original instructor is unavailable) contact FCLD to have the new instructor added into the course. FCLD cannot add users to a course without permission of the instructor.