Students may take a leave of absence for up to three quarters, meaning if the last time you registered was in Autumn 2020, you would need to register again by Autumn 2021, or you will become inactive. Students can submit a Leave of Absence application by going to the Student Menu in Banner, then the Academic Records Menu. This is what you should see.
You may find more information about taking a Leave of Absence, including the university's policies, on the Leave of Absence provided by the Office of the Registrar.
When you submit a Leave of Absence application, please also be sure to alert your program chair about your plans, if you have not already been in communication.