Most aspects of this course (finding projects/supervisors, submitting work, etc) are handled via TMS.
https://thesis.cse.unsw.edu.au/
Logins to TMS will be sorted out during O-week or whenever you find a supervisor/topic.
You can view topics in TMS without needing a TMS login, but you can also negotiate new topics with a potential supervisor (who can then add them into TMS).