Unfortunately, in accordance with ASIC rules and regulations, you CANNOT change your business name once registered. So please make sure that you correctly spell your business name and use the appropriate grammar.
However, you can register another business name using the same ABN and start trading under the new business name. ABN's can have unlimited business names assigned under their entity. You can apply to cancel the existing business name. ASIC will not refund fees for a cancelled business name.
It is however possible to update business name details such as your business address, so contact our support team on 1300 006 263 or via email on support@namecorp.com.au if you wish to do so.