You can use the date when the customer canceled the invoice, Floriveln_0223. Let me help you create the credit memo.

The transaction is used to reduce the customer's balance. You can use it as a payment for the customer's invoice. 

Here's how you can create a credit memo:

1. Click the New button.
2. Select Credit memo.
3. Fill in the necessary fields.
4. Click Save and close. 

I'll also add this article for more information: Create and apply credit memos or delayed credits in QuickBooks Online.

Feel free to let us know if you have other concerns. We're around 24/7 to help you. Keep safe!