Hi there, @JMG6.

Thanks for joining this conversation. Allow me to hop in and share information about adding multiple email addresses to customers in QuickBooks Online (QBO).

Yes, you can! You have the option to enter multiple emails in your customer's profile, invoices, or estimates in QBO. Any attached email will receive the invoice once sent. Make sure that the email addresses are separated with commas (,).

Here's how to do it:

1. In QBO, go to the Get paid & pay or Sales menu at the left pane.
2. Proceed to the Customers tab.
3. Select the customer you want to update, then click Edit.
4. In the Email section, enter the email addresses separated with commas (,).
5. Hit Save to complete.

You can also do this directly in the Customer email section on an invoice. For more information about managing emails and customers in QBO, consider checking out these articles:

• Add and manage customers in QuickBooks Online.
• Email a sales form or report to multiple email addresses.

For more tips and other resources, visit our website for future reference: Self-help articles.

Please post again or leave a comment in this thread if you have additional questions about this or anything else. I'll be more than happy to assist. Keep safe always.