Hope you're doing well today, @RECaaj3. You can create a credit memo to record a chargeback transaction for your customer. 

Here's how: 

1. Click the +New at the top, then select Credit Card Credit under the Vendor column. 
2. Enter the vendor’s name under Payee. 
3. Select the credit card under Bank/Credit account. 
4. Under the Item details sections, enter the item, and the amount to be credited. 
5. Click Save and close. 

Then, create an invoice and link the credit memo you've created. Here's how

1. Click the + New menu, then select Invoice.
2. Enter the customer under the Customer drop-down menu.
3. Edit the Invoice date to when you received the repayment.
4. Type in the same product or service found on your original sales receipt under the Product/Service drop-down menu.
5. Put in the correct amount as well under the Amount column, then click Save.

You can also check out this article to learn more about recording a vendor refund in QuickBooks. 

For future reference, Follow this article in case you need some easy steps in receiving invoice payments in QuickBooks Online. 

Let me know if there’s anything else you need. We're always around here to help in any way we can.