Thanks for jumping into this thread, LAP55.

We'll want to use the QuickBooks Tool Hub to fix this issue with QuickBooks sending duplicate emils. This tool is designed to automatically diagnose and fix common issues within the software.

Below are the instructions on how to do it:

1. Close QuickBooks.
2. Download the most recent version of the QuickBooks Tool Hub. Save the file somewhere you can easily find it.
3. Open the file you downloaded (QuickBooksToolHub.exe).
4. Follow the on-screen steps to install and agree to the terms and conditions.
5. When the install finishes, double-click the icon on your Windows desktop to open the tool hub.
6. Once the  QuickBooks Tool Hub is open, select Program Problems.
7. Select Quick Fix my Program.
8. Start QuickBooks Desktop and open your data file.

To ensure the components are properly updated, please restart the computer after running the tool.

You can also run the Transaction History of the invoice to review details including when you send it.

To do that:

1. Click the Customers menu at the top to select the Customer Center.
2. Tap the Customers & Jobs tab to see the list of customers.
3. From there, choose the appropriate customer to display the Transactions tab.
4. Double-click on the invoice to view the complete details.
5. Hit the Reports menu on the Invoice page.
6. Then, press the Transaction History menu to check the information.
7. The date when the invoice was emailed will show in the Sent Date section.

Keep me posted for additional questions or other concerns. I'd be more than happy to help. Wishing you the best of luck.