A business name can be defined as a name or title under which a person, or other legal entity, trades.
How do I register my business name?
How you register your business name depends on the type of business you conduct.
In Australia, it is important to register your business name in all states or territories that you wish to operate. However, a business name registration is unnecessary if you wish to operate under your, or your partner's, first and last name.
1) You can check if your business name is available by searching the National Names Index.
2) If available you can proceed to Register your business name in your state or territory
Step 4 - Register ABN (Australian Business Number) .