Customize client profile

Thanks for sharing your concern in the QuickBooks Community, @Drillpoint.

The option to customize the customer's profile which would allow estimates and invoices to be sent to different email addresses is unavailable in the program. For now, you can only set an email address to their profile which can be used when sending sales transactions. 

If you need to send estimates and invoices to different email addresses, I'd suggest manually editing each email info before sending the transactions to your clients. You can do this when sending the estimate and invoices (converted estimate). 

I can see how this option will help you when sending your sales to your clients. Thus, I'll take note of this to improve your experience in QuickBooks Online.

Moreover, you can send your suggestions to our developers. They can review them and most likely include them in our future updates. Here's how:

1. Go to Settings and click Feedback.
2. Enter your comments or product suggestions. Then, select Next to submit feedback.

Your valuable feedback goes to our Product Development team to help improve your experience in QuickBooks Online. You can track feature requests through the QuickBooks Online Feature Requests website.

If you want to view your sales transactions for all of your customers, you can check out this article for more guidance: View sales transactions.

In case you have any other concerns with regard to sending estimates and invoices to the program, add your details in this thread. I'll be more than happy to lend a hand. Have a good one.