I appreciate you chiming in the thread about changing your email in QuickBooks Desktop (QBDT), Tara. Let's get this started by following the steps below.

Beforehand, ensure that you are the admin so you can update your email address for notification in QBDT.

Here's how:

1. Go to the Help menu and choose to Manage My QuickBooks Account.
2. Sign in to your Intuit account.
3. Select the product or service you like to manage from the Manage your QuickBooks page. 
4. Check if you're logged in to the correct company by looking at the top right corner. If not, choose the correct company from the drop-down.
5. Scroll down to the Authorized Users list.
6. Click Edit beside your name.
7. Type in your new email address, then Save. Hit the X to get back to the home page.
8. You'll receive a notification to your new email address about any updates.

Please refer to this article for more details: Update the email address in QuickBooks Desktop.

I've also added the following articles for future reference:

• Create an invoice in QuickBooks Desktop
• Record an invoice payment

Keep us posted if you have any other concerns or clarification about managing emails in QBDT. We're always here for you. Have a good one!