Hello there, @labels1. I know how to extract invoices successfully from the Send Forms window. I'm here to share them with you.

Before we start, may I know how you removed the invoices from your Send Forms? Usually, you can clear them from there by going to each entry and unchecking the box beside Email Later.

1. Locate the invoice from your customer's transactions list.
2. Open the transaction.
3. Remove the check mark beside Email Later.
4. Click on Save & Close.
5. Repeat the same steps for other invoices.

Once done, review the entries under Send Forms. If you still see the transactions, run the verify and rebuild tool to fix common issues within your file that may affect the issue.

To verify your data:

1. Choose Window, then Close All.
2. Go to the File menu, then Utilities. 
3. Select Verify Data.

To rebuild your data, select Rebuild from the File menu. For reference, you may open this article: Verify and Rebuild Data in QuickBooks Desktop.

On the other hand, I'm adding these links for more tips while managing your forms in QuickBooks Desktop: 

• Email sales forms, invoices, and statements in QuickBooks Desktop
• Get started with customer transaction workflows in QuickBooks Desktop
• Accounts Payable workflows in QuickBooks Desktop

 If there's anything else you need help with removing your invoices from your send forms lists, let me know by adding a comment below. I'm more than happy to provide additional assistance. Have a great weekend!