Hi there, @JLK!
It depends on how you create your invoice. Allow me to share a few insights help you from there.
First, invoices created from an estimate will say invoiced in full. While created regular invoices don't say invoiced in full.
Ideally, invoices from an estimate create an open estimate once it isn't completely converted to invoices. Thus, invoiced in full reminds you if there's a need to handle an open estimate or not.
With this, let's open and review your estimates that doesn't says invoiced in full. From there, you can copy your estimates to invoice if there's still an open quantity.
Lastly, here's an article you can read to learn more about copying your estimate to invoice: Create Partial Invoices From an Estimate.
It'll be always my pleasure to help if you have any other questions. I'm always around ready to help.
