QBO is constantly rolling out improvements for users like you and me to keep up with. I thought the new invoicing capability was worth a second look.
Invoice Email CC/BCC
QuickBooks Online users spoke, and Intuit listened. If you use the invoicing feature in QBO, you’re really going to like this update. In response to user feedback, QBO now allows you to include a carbon copy (cc) or a blind carbon copy (bcc) when you send invoice emails.
If you want all of your cc: or bcc: invoices to be sent to the same email address, say, your business partner’s, you can enter a default email address here: Gear Icon > Account and Settings > Sales > Messages.