Thanks for getting in touch with the Community, Teric22.
 

I can certainly understand how an ability to enter multiple email addresses in a customer's profile could be useful and have submitted a suggestion about it as of today.
 

You can also submit your own feature requests while using QuickBooks.
 

Here's how:

1. In the top menu bar, go to Help, Send Feedback Online, then Product Suggestion....
2. Choose a Type of Feedback and Product Area (optional) from your available drop-down menus.
3. Enter any suggestions/feedback in the Here is my suggestion: field.
4. If you'd like, include your name/email in the My name is: (optional) and My e-mail address is: (optional) fields.5. Select Send Feedback.

Your feedback's definitely valuable to Intuit. It will be reviewed by our Product Development team and considered in future updates. You can stay up-to-date with the latest news about your product by reviewing Intuit's Product Updates webpage.
 

As far as sending statements and other forms to different email addresses then what a customer's profile has on file, you can simply change the email in the send to field when in the process of composing/sending the email. Once you've made your changes to the outgoing email, then select Send to send it to the different address.
 

Please don't hesitate to send a reply if there's any additional questions. Have a wonderful day!