Can I send a copy of an ivoice marked "paid" to a customer via QB's?

You've come to the right place, @browardacademy.

Yes, you can send a copy of you paid invoice to your customer through QuickBooks.

Here's how:

1. Go to the Sales menu.
2. Choose the Invoices tab.
3. Locate the paid invoice you want to send.
4. From the Actions column, click the drop-down arrow.
5. Select Send. 
6. Enter the recipient's information.
7. Click the Send button.  

You can read through this article for more detailed steps: How to Email or Print an Invoice.

Also, I've got these articles to learn more about managing your transactions:

• Email or print multiple invoices and sales forms

• How to customize invoice emails.

• Create and send a sales receipt

Always leave a comment below if you have other questions. I'll be here should you need further assistance.