I want to know the steps how to allocate customer credit note to customer invoice.
Hello there, @acceptable characters.
Let me step in and assist you in allocating your credit note to your customer's invoice.
You can allocate your credit note once you receive the payment of your customer's invoice. You can follow these steps on how:
You can read this article in case you need help applying a delayed credit note: Create and apply credit notes or delayed credits in QuickBooks Online.
I've also added an article that helps you deposit your customer's payment: Record and make bank deposits in QuickBooks Online.
If you have additional questions, please don't hesitate to leave a message in the comment section. I'm always around here in the Community to help. Take care, and have a great day.