This transaction type has a different term in other regions, o.collinshennink.
For QuickBooks Online used in Australia, Credit Memo/Note is referred to as Adjustment Note. So when you click on the Plus icon, just select Adjustment Note to create the transaction.
But if you still can't find this option, you can follow these troubleshooting steps:
Don't hesitate to leave a reply if you more questions about this.
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