After you have purchased your online practice exam, the practice exam link will show on your account homepage. After following the link on your account homepage, you will be presented with another practice exam link. To start the exam session, click the link, then click the Begin exam button. Once you press the Begin exam button, your exam session will start.
If you do not start your practice exam when you purchase it, you can start the practice exam later, within the 90-day practice exam authorization period, by logging into your PTCB Account and clicking the My Scheduled Practice Exam Appointment."