You can do this two ways.
Logged out, from the sign-up page:
Go to the ABLE for ALL website to sign up for a new ABLE account. During the first step of registration there will be a link to sign in. Log in and follow the steps to create an ABLE account for either yourself or your beneficiary.
Logged in, from the dashboard of your account on a desktop or mobile device:
In the upper right corner of the screen, or in the navigation on mobile, find the link that says “create new account.” Click it and follow the steps to create a new ABLE account.