For regular 16-week courses:. Friday, Aug. 21 – Last day to add classes online. Friday, Aug. 28 – Last day for a tuition refund. Friday, Aug. 28 – Last day to make payment plans before $100 late fee. Tuesday, Oct. 27 – Last day to withdraw classes with a "W". If you have any questions, set an appointment with your advisor or visit us at wichita.edu/services/onestop.