Hi there, @ RoseR.
As of the moment, there isn't an integrated way to select multiple estimates when creating an invoice. You'll be asked to create a separate invoice for every open estimate of your customers.
On top of that, I've also included this reference for a compilation of articles you can use while working with us: Learn the different ways you can track customer transactions in QuickBooks Desktop.
If there's anything else that I can help you with, please let me know in the comments below. I'll be here to lend a hand.
