Hello @hsechampionstt,
As of the moment, there isn't an integrated way to let the system automatically create the invoice from an estimate. This is because you'll be asked how much you'll have to invoice the customer base on the amount or number of items they've confirmed on the estimate.
In the same manner, here's an article you can read to learn more about creating estimates: Create and send estimates in QuickBooks Online.
On top of that, I've also included this reference for a compilation of articles you can use while working with us: Manage Customers and Income for QuickBooks Online.
We appreciate your patience as we're working on this. Please let me know in the comments below if you have any other questions.
