Tax File Number
Antes de llegar a Australia, you will draw the Tax File Number, which is the number of social security. It takes about since I transacted between 2 and 4 weeks. If when you start your course (date from which you can start working) you do not have your tax file number, no problem, is said to be underway and to be received soon.
The Tax File Number is needed in Australia to work legally. With your student visa you can work up to 20h per week in your study period and up to 40 hours weekly in your holiday period. When passing 6 months after being listed on Australia, se puede hacer la tax refund when you return to your country.