Create a myGov account using an email address, then sign in and choose Services Australia to link Centrelink. You may need your Centrelink Customer Reference Number (CRN), identity details and a linking code from Services Australia, which can be obtained through the official website, phone service or a service centre. Once linked, you can view messages, report income, update details and claim some payments online. If you have trouble proving your identity or linking the service, contact Services Australia directly rather than sharing your login details with anyone.