Correcting an invoice payment depends on how you process the payment, tonkacarpentry. Let's explore this matter together to ensure transactions are documented accordingly.
Beforehand, it's essential to determine how you process payments to correct them. Did your customer pay directly to the invoice, or did you manually record the payment?
If the customer has processed the payment directly to the invoice, the payment will be linked to that specific entry.
If you recorded the payment manually, there's a great chance that the wrong invoice was selected. This can be fixed by unlinking the payment and reapplying it to the appropriate one. Before doing so, you'll want to turn off the Automatically apply credits feature.
Here's how to unlink the payment from the incorrect invoice:
- Select Sales, then Invoices.
- Locate the transaction from the list. You can utilize the filters available to look for it quickly.
- Choose View/Edit from the Action column and click the payment link below the Payment Status.
- Select the date link and uncheck the invoice under Outstanding Transactions.
- Pick Save and close, then Save as a credit.
- Confirm the action by clicking Yes and Save as a credit.
After that, proceed to these steps to link the payment to the correct invoice:
- Click +New, then Receive payment.
- Select the customer from the Customer dropdown.
- Check the invoice in the Outstanding Transactions section and ensure to select the payment you've unapplied earlier from the Credits section.
- Review and provide the details from the remaining fields.
- Hit Save and close.

For more information, refer to this article: Record invoice payments in QuickBooks Online. It also contains instructions about editing a payment amount and voiding or deleting the transaction.
Moreover, several reports are available to help you if you want to get insights from the items you sell or the status of your inventory. To determine which data best suits your needs, scan this material: Use reports to see your sales and inventory status in QuickBooks Online.
Ensuring customer payments are recorded properly is essential to maintaining an accurate record. If you have additional questions regarding this process or you need assistance with anything else, please post them in this thread. We'll be around to address any queries you have in QuickBooks Online.