From 1 July 2016, all student visa applications must be made online. Here’s some information to assist with preparing your application.
Tips to avoid common mistakes in the application form
Remember to lodge your application as soon as you can. Complete applications are more likely to be processed quicker. While we aim to process most applications within one month, some applications will take longer. If you have to contact the Department about your application please use our student visa enquiry form.
Source: https://migrationblog.border.gov.au/16/12/02/tips-prepare-your-student-visa-application