You can manage your Prepaid account online after you enroll in My CenturyLink.
After you confirm an order for new service from CenturyLink, look for an email from "CenturyLink Notifications" with a personalized link to create your online account. When you click this link, you'll be directed to the registration page, which will be auto-filled with your email address. Enter your service address zip code to verify your account. Then create a password, acknowledge the terms and conditions, and you're done!
If you don't receive the enrollment email, don't worry, you can still sign up. Learn how to enroll in My CenturyLink.