The Community has you covered, @RSWarehousing. I've got some further troubleshooting to help you with the incorrect email when sending an invoice.

To start, let's first check your email set up in the email preferences in QuickBooks Desktop. Let me walk you through the process:

1. Navigate to the Edit menu and choose Preferences.
2. Click Send forms.
3. Go to the My Preferences tab and tick the WebMail radio button,
4. Hit the Add button and look for your provider from the drop-down then enter your email address. 
5. Make sure that the Use Enhanced Security checkbox is checked (You can uncheck the box for Use Enhanced Security if you receive the error message: Network Error. Please try again.), then select OK.
6. If prompted, log in to your Intuit account. The username or email address you use here may not necessarily be the same as the one you are connecting to your QuickBooks.
7. You'll see your webmail provider's login page. Sign in and select to grant Intuit access.

Once done, send the invoice again. For the detailed steps, please see this article: Connect your email to QuickBooks Desktop.

If you still encounter the same thing, I suggest reaching out to our technical support team to further investigate the root cause of the issue. They use specific tools to do a screen share to give further instructions. Follow along below to connect with them:

1. Click the Help menu at the top, and then select QuickBooks Desktop Help. 
2. Hit Contact Us.
3. Enter a brief description of your issue, for example, Invoices send from the same (often incorrect) email address in QuickBooks. 
4. Tap Let's talk. 
5. Choose Start a chat. 

Here's a great source where you can find articles that can help you in managing your books in QuickBooks, please visit our QBDT help articles page. This includes topics such as reconciliation, track income, and expenses, run reports, etc.

Feel free to post here in the Community if you have any concerns about emailing invoices in QuickBooks. I want to make sure you're taken care of, and I'm here to help you anytime. Take care always.