Tax Filing Deadline 2024 Australia.  — for the tax year in australia, business owners file their income tax returns between 1 july to 31 october unless they’re registered with a tax agent. Using a tax agent can provide you with more time to prepare and.

Extensions for registered tax agent. If you use a registered tax agent like us for help, the deadline is usually later, but you’ll still need to consult with them before the 2nd to avoid penalties.