Hello Cathy,
I know how important it is to keep your customer's information up-to-date so that you're able to send them invoices in the most efficient way possible. QuickBooks Online makes updating this info simple, but I want to go over why you're not seeing it adjusted when you create a new Invoice through a project.
Since your project was created and saved with your customer's previous email address, a change to their customer profile won't change the email address that's associated with the project. So when you navigate to the Project and add a new Invoice, you're still seeing the customer's previous email address. In order to change it you'll want to manually enter the correct email address into the email field of the Invoice, clearing the previous one out in the process. You'll notice that if you create a new Invoice from the + New button that the new email is populated, so rest assured that the change has been made in the system.
I know that this might slow down your workflow, so I'd like to encourage you to navigate to the Gear icon to submit Feedback. Sharing your thoughts this way ensures that our product developers are aware of the parts of our program that need improving. They'll take your suggestions into consideration when implementing new features and improving existing ones. To keep an eye on what they're adding, check out our New Features page.
Let me know if there's anything else I can do to help. Have a great day!
