You can do so in Studielink. Check the step-by-step guide for details.

If you are not registering for courses make sure to submit your re-enrolment request no later than 31 August.
You can track the status of your re-enrolment via sis.uva.nl.  

Flexible learning pilot

Do you want to take part in the flexible learning pilot? See uva.nl/flexible-learning for the participating degree programs and for more information.