If you've been signed up for PDANS through a test center you can activate your online account here.
Start by entering the phone number you signed up with. This phone number should be capable of receiving text messages.
By Submitting, you agree to receive recurring text messages, calls, and/or emails at the number(s) given at registration. Carrier Msg and Data may apply.
In order to discontinue, you can contact your test center or unsubscribe by logging into your account. Terms & Conditions