For the verified certificate track, you have until 14 days after your payment or 14 days after your course starts to request a refund, whichever comes second. After these dates, we can no longer provide a refund.
For professional education courses, refunds are available up to the second day of the course.
To process a refund within the 14 days window go to your edX dashboard find the course, then click the small "settings" icon next to the View Course or View Archived Course option. There you will see an unenroll option. Once unenrolled a refund will be processed within 24 hours and appear back on your credit or debit card, or PayPal account within 3 to 7 business days. For verified courses you are welcome to then re-enroll in the free audit track if you wish.