Where do I change the email address the invoices are being sent to. Also can I send invoices to more than one person

Hi there, 

Since this is your first post in the Community, I'd like to give you a warm welcome! 

The default email address when sending sales forms like invoices, transactions and reports is quickbooks@notification.intuit.com. Changing the sender email address in QBO is currently unavailable. 

I encourage you to send your feedback to our engineers by clicking the Gear icon and selecting Feedback. This goes directly to our product development team to help improve your QuickBooks Online experience. Let me know if you have other questions. I'll be here to help steer you in the right direction.