Your business will inevitably change and grow - changes in your business circumstances may result in a need to change your business structure, your legal or trading name, your address and contact details. These changes may affect your tax and other regulatory obligations.

Change of business structure
Changed business circumstances may require you to change your business structure. For example, you might start off as a sole trader, then take on one or more partners and form a partnership, and then later still register as a proprietary limited company.

Change of personal details
Depending on the circumstances, you may need to advise the Australian Taxation Office (ATO), the Australian Securities and Investments Commission and your state or territory government. Such changes could be to your legal or trading name, associates, postal, email or business address, main business activity, financial institution account information, or authorised contact person details.

Change your ABN details
You can change your ABN details with the ATO through:

• online transaction, if you have an ATO digital certificate
• Phone the ATO Business Infoline on 13 28 66
• Email the ATO Business Registration Service at BusinessRegistrationQueries@ato.gov.au
• Mail - download and print the change of registration details form
• or through your tax agent.

Check your ABN details
Use ABN Lookup to check whether your ABN details are up to date.