Answer:
An ABN is a unique 11-digit number that identifies your business or organisation, and it is compulsory to have one in order to operate and trade as a business in Australia.
First you must fulfil the ‘entitlement’ requirements. If you are not entitled to an ABN and still apply for one, your application will be refused. This includes providing details about your situation, activities, business structure (entity type) and identity. In order to qualify, you need to prove that your enterprise will operate in Australia, you will need to have a good idea of your business plans and structure and demonstrate commencement of an enterprise. You can check your entitlement through the Australian Business Register website.
If you are entitled to an ABN, you can then apply online or lodge a form by mail, providing details about yourself and your business such as its name, location, details of your associates, the business’s intended activity, Tax File Number and a declaration that the information you have given is correct.
If your business is a company structure, you’ll need to first of all register with ASIC (Australian Securities and Investment Commission). If your application is successful then your business will be listed on the Australian Business Register.