Thanks for posting your question in the Community, Liz2019,
I'm here to provide information about the Import Invoice feature in QuickBooks Online.
Currently, the automation for importing your invoice transactions in QuickBooks Online AU is unavailable. This feature is available in QBO users in CA and UK.
We’re working on releasing this feature to all regions soon. For product updates, you check out our blog post for recent changes.
For the meantime, you can add your past invoice transactions by creating them in QuickBooks Online. All you need is the information of these transactions to add them one by one.
If there’s anything else I can help you with in your QuickBooks Online account, please don’t hesitate to let me know. Have a great day!