I've received a credit note from my customer which they have deducted from their payment to me. How do I record this in my bank?

Nice to have you in the Community space, Tracey.

You'll want to record a bank deposit and use the Account Receivable A/R account to account for your customer payment. I'll show you how. 

1. Go + New menu in your QuickBooks Online (QBO) account.
2. Select Bank Deposit.
3. From the Account ▼ drop-down, choose the account you want to put the money into.
4. Scroll down to the Add funds to this deposit section.
5. From the RECEIVED FROM column, select your preferred customer.
6. In the ACCOUNT drop-down, select the Account Receivable A/R account.
7. Fill in the needed details and review the deposit.
8. Select Save and close or Save and new.

You can also check this link for more details: Record and make bank deposits in QuickBooks Online.

I'd also encourage you to seek help with your account for other ways to better record this. This way, we can ensure your accounts stays accurate. 

Additionally, I've attached these links for your reference. These will help you in ensuring your bank and QuickBooks are in sync and mange your customer credit seamlessly: 

• Reconcile an account in QuickBooks Online
• Create and apply credit notes or delayed credits in QuickBooks Online

Please don't hesitate to leave a response if you have further questions about recording transactions in your QBO account. It's always my pleasure to help you at any time. Keep safe!