Getting an error when trying to send an invoice to two emails?How to mark an invoice as paid?When amending an invoice and resending, still didn’t paid the original invoic

I see the importance of efficiently managing your business, Emma. I'm here to help you resolve this issue quickly. Before troubleshooting, can you tell me what error message you encounter when sending an invoice to multiple emails? This way, I can check on my end to see if there is an ongoing investigation. In the meantime, I recommend the following steps to troubleshoot the issue.

1. Ensure you have entered both recipients' correct email addresses. Double-check for any typos or missing characters.
2. Check for special characters or spaces in the email addresses and remove unnecessary ones.
3. Clear your browser cache and cookies, then try sending the invoice again. Sometimes, temporary browser data can cause unexpected issues.
4. If the problem persists, try using a different browser or device to see if it's a browser-specific issue.

Regarding marking an invoice as paid, you need to receive payment to mark it as paid. Enter the full amount received & check off each invoice to clear. Follow these steps:

1. Go to the Sales tab in QuickBooks Online.
2. Select Invoices from the drop-down menu.
3. Locate and open the invoice you want to mark as paid.
4. Click the Receive Payment button at the top right of the invoice.
5. Enter the necessary details, such as the payment date, payment method, and amount received.
6. Save the payment information, and the invoice will be marked as paid.

When amending an invoice and resending it, the original invoice's payment status will not change. If the customer hasn't paid the original invoice, it will still be reflected as unpaid. For more information, check out this article: Record invoice payments in QuickBooks Online. This article also provides steps on how to record a payment in QuickBooks. 

For guidance on processing online payments with debit or credit cards in QBO, check out this article: Create an invoice your customer can pay online.

If you need further assistance with any QuickBooks Online-related issues, don't hesitate to contact us again in the Community. We are available to help you resolve any errors or technical difficulties. Have a great day!