@ProfessorPlum168 Dropping a class is as easy as a few clicks on CalCentral. The deadline is usually a few weeks into the class; look at the academic calendar for the exact date. You don’t get any refund because you pay by the semester, not the units. You can take as many units as you want up to 21.5 or as few as you want (13 in L&S). It’s the same amount of money.