Can you set custom transaction number for credit note seperate to invoice number

Let me provide you with some information about credit note numbering, caryn-botma-voda. 

Generally, credit notes follow the same sequence in numbering as invoices. You'll want to let our product team know how this will benefit your business. You can go to the Customer Feedback page to check if related concerns have already been submitted by other QuickBooks users. If not, you can send feedback instead.

Furthermore, learn how to customise the appearance and layout of your sales forms. I've added this article for more information: Customise Invoices, Estimates, and Sales Receipts In QuickBooks Online.

Please touch base with us if there's anything else you want about the credit note. We'll always be right here to help you.