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You've come to the right place, @browardacademy.
Yes, you can send a copy of you paid invoice to your customer through QuickBooks.
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
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.