How do I recover an invoice that just disappeared?

Hi canadiancove,

Welcome to Community!  QuickBooks Online has the features you need to stay ahead of your work. I'll be glad to help!

In situations where an invoice no longer exists in your account, you'll want to look at the audit log to see if has been marked as void or deleted.  Here's how;  

1. Open your Settings ⚙ in the top right

2. Select Audit log

If you notice the invoice has been deleted or marked as void, you'll need to re-create it by following these steps:

1.  From the left menu open +New

2. Choose Invoice

3. Complete the required fields

4. Hit Save and close when done

Please don't hesitate to reach back out with other questions.  We're always glad to assist!