What ATAR do you need for psychology?
Psychology cut-offs usually run from about 70 to 90. Where a course sits depends on the type of degree and the university.
A dedicated Bachelor of Psychology, especially an honours-track version, tends to sit at the higher end. That often means 85 or above at Group of Eight universities. Studying psychology as a major inside a general arts or science degree usually has a lower cut-off.
This gives you a useful option. If a dedicated psychology degree is out of range, there is another option. A general degree with a psychology major often reaches the same place, at a lower entry point.