I want to make multiple email addresses for our customers

Hello there, @kathhoward.

You have the option to enter multiple emails in your customer's profile. Ensure that the email addresses are separated with commas (,). Let me show the steps.

1. Go to the Sales menu.
2. Click Customers page.
3. Click the customer's name to open their profile, then select the Edit button to view their information. 
4. Enter the other email address (separated by a comma) in the Email section.
5. Hit Save.

Please see the screenshot below.

To give you more insights about adding customer's details and emailing forms in QuickBooks Online, please see these resources:

• Email a sales form or report to multiple email addresses
• Manage your customer list

Please reach out to me if you have any other issues or concerns, and I'll get back to you. I'm always here to help. Have a good day!