I have mark some invoice paid by accident, how can i undo them?

Hi Isaac.

Thank you for reaching out to us here on the Community page. I can help you with fixing your invoices that were marked as paid by accident.

You can delete those payments to unlink them from your invoice transactions. I'll guide you how.

1. Open your QuickBooks Online (QBO) account.
2. Click on Sales at the left pane, then select All Sales.
3. Locate the payment from the list, then open the transaction.
4. From the Receive Payment window, click on Delete from the More button.
5. A pop-up window will appear that the transaction is linked to others. Hit Yes, to confirm the action.
6. Repeat the steps for other payments.

Once you're ready to record the accurate payments, you can open this link as your guide: Record invoice payments in QuickBooks Online.

You can also process your customer's invoices and payments online using QuickBooks Payments. To know more about this feature, you can open this article: Take and process payments in QuickBooks Online.

If you have any other questions about deleting receive payments in QuickBooks, let me know by adding a comment below. I'm always here to help. Keep safe!

I marked an invoice paid when it has not been paid. In your explanation step 4 you said from the "receive Payment Window" but you did not explain how to see that window. When I click on the sale from the all sales, I just get the invoice # in the upper left corner, not what you show. How do I get to that screen with Receive Payment up there on an invoice that is already shown as paid?

Hello there, Dcassels13.

Let me share additional information regarding undoing the invoice as unpaid again. 

You can follow these steps:

1. Go to the Sales menu and select All Sales.
2. Open the invoice that was accidentally paid. 
3. Click the payment link then the date link at the upper-right below the PAID stamp. 
   
4. In the Receive Payment page, uncheck the Invoice. 
   
5. Click Save and close. You'll be prompted to use the payment as a credit or sales receipt and select your preference.
6. Confirm the action.

The payment will show as unapplied where you can use it to pay the customer's future invoices. If you want to delete the payment instead, just click the More menu at the bottom of the Receive Payment page and then Delete.

For more details in handling customer payments, you can use these links: 

• Record invoice payments in QuickBooks Online.
• Common custom reports in QuickBooks Online.

You can get back to this thread if you have any additional questions. I'll be around ready to help.

Does this delete the whole invoice?

Thanks for chiming in on this thread, @JackieB811.

I'd love to help you achieve your goal, but would you mind telling me more about your question? Do you want to undo an invoice that has been unintentionally marked as paid? Or do you want to reverse the payment from an incorrect invoice? I'd appreciate any additional details that you can provide so I can help you out. 

In the meantime, I want you to make the most of QuickBooks for your company. You can read some articles that will assist you in learning how to use the software: QuickBooks help articles page.

I'd appreciate it if you could provide more details about your concern. We look forward to it.