Only register for courses that you definitely intend to take. However, if you encounter unforeseen circumstances which prevent you from taking active part in a course, it is possible to cancel the course in "My Education" up to 1 day before the course starts. Otherwise you will be charged the full course fee.
Note that not cancelling and not showing up in a course may lead to GSSE contacting your supervisor(s).
The courses with a course fee will be charged from your ITB 10 days after the start of the course.
If you use a project code other than your ITB, make sure you have the permission (e.g. from your supervisor) to use the code.