If the course is a Chemical Engineering course, then email firstname.lastname@example.org with your request. We will increase capacity of almost any CM class, with only a few exceptions. Lab sections cannot be expanded.
If the course is in another department, please contact the department or the instructor of the class with your request.
If you still are not able to get into the class then you should periodically check the enrollment until the semester starts. If another student decides to drop the class then a seat will open up. Remember that you can add/drop classes on Banweb from when registration opens through the first week of classes of that semester.