I am invoicing my customer and want to add an additional email address to send the invoices to. How do I do this?

I'm glad to have you here, @precisionplumbin1. Let me assist you in adding an additional email address to send the invoices within QuickBooks Online (QBO).

In QBO, you can add multiple email addresses for a customer by separating them with a comma. Here's how:

1. Go to Customers & Leads and select Customers.
2. Click the customer's name, then hit Edit.
3. In the Email section, enter the email addresses separated by a comma (sample1@intuit.com, sample2@intuit.com).
4. Click Save.

See these short clips as a reference.

Additionally, you can also use the CC/BCC feature to include a Carbon Copy and Blind Copy email address when sending invoices, allowing you to receive a copy of the email. Just select the CC/BCC option located under email.

I've added a short clip as a reference.

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

• Email a sales form or report to multiple email addresses.
• Customize invoices, estimates, and sales receipts in QuickBooks Online.

Feel free to visit us in the Community if you need further assistance with adding an email address for sending invoices in QBO, and we will respond swiftly to provide support. Have a wonderful day ahead.