@Sambar281764 @munchine 

Open a new blank QBO account

https://quickbooks.grsm.io/Australia

then you may have 2 options:

1. Prepare the data in XLS/CSV format and utilize an importer tool

https://transactionpro.grsm.io/qbo

2. Purchase a 3rd party conversion service.

Contact us in private.

Afaik, Intuit only provides a Quicken converter for US version.