I have been using Quickbooks online and I had been trying to send invoices to the customers but it is not being sent and showing error even though the email address are correct. It is happening for every invoices. How can I solve this problem?

Hello there, Wander Woman.

We have an ongoing investigation regarding the inability to send invoices with an error about the customer's email address. Our product engineers are already aware of this issue. With this, they are carefully working to get this fixed right away.

In the meantime, I recommend contacting our customer support team so they can add you to the list of affected users, and you'll receive timely updates via email. Let me guide you on how.

1. Sign in to your QuickBooks Online company.
2. Click on the (?) Help icon.
3. Proceed to the Search tab.
4. Select the Contact Us option.
5. Enter your concern, then pick Continue.
6. Determine how you would like to connect with us:

• Start a chat with a QuickBooks support expert online.
• Ask the community to get assistance from businesses like yours.

Also, please observe their support hours so you can connect with them accordingly.

As a workaround, you can download your Invoices as PDFs and send them manually to your customers via Personal/Company Email.

On the other hand, once you're ready to record customer payments, you can review this material as your guide: Record invoice payments in QuickBooks Online.

Please feel free to inform us in the thread if you need further assistance managing your invoices or any related concerns in QuickBooks Online. I'm always here to help.