Find the time slot you wish to sign up for and note the number.
Go to the bottom of the page and enter the Appointment number, your name, email address, reason for the appointment and a password (used if you need to cancel your appointment). Then press the submit button.
If you need to cancel your appointment, click on the box next to your name and then enter your password and press the submit button. You cannot delete and add an appointment at the same time (only one operation at a time).