People in Sydney can access Centrelink online through a myGov account linked to Centrelink, including payment claims, reporting, messages and updating personal details. You may be able to complete your task online without visiting a service centre, although some matters require identity checks, documents or an appointment. Check the official Services Australia website for instructions, online services and Centrelink service locations in Sydney. Your options and eligibility depend on your circumstances and are decided by Services Australia.