After you receive the waitlist flow URL from the center, click the URL to fill out the parent and child details to join the center's waitlist. 

If the waitlist flow is from a company with multiple locations, you'll be able to choose your desired location from the centers' list.

If the waitlist flow is from a center with a single location, you will not be able to pick and choose the center location. you can only submit the waitlist form for that location.

If the company/center has any waitlist fee, you need to pay that waitlist fee before submitting the form.