How to track multiple business in quickbooks online

You may utilize the Class feature in QB Online (not QBSE)

https://quickbooks.intuit.com/learn-support/en-ca/reports/run-reports-by-class/01/372542

If you have to open a new QBO account, make sure to click the Buy button to get the discounted price for up to 3 months. If you purchase from the trial account, you have to pay the regular price.

https://quickbooks.grsm.io/Canada

https://quickbooks.grsm.io/Canada-fr