I have several Estimates that are marked as Rejected. Is there a way to locate them once rejected?

It's good to see you here, Peter.

Yes, you can definitely still track any rejected transactions in QuickBooks.I can walk you through the steps on how to find those estimates in QuickBooks Online. 

Here's how:

1. Go to the Sales menu and click on the All Sales tab.
2. Click the Filter menu and choose Estimates.
3. For the Status, choose Rejected.
   
4. Once the filters are applied you'll be able to get the list of all rejected estimates.
    

I'll be sharing this Resource page, to help you with your tasks in QuickBooks Online: Help Articles for QuickBooks Online International

If you need further assistance with the steps, post here again. We want to make sure, we're able to help you further with anything about our program. I'll be right here to help you also. Have a good day!