Can not review an quotation to edit the quote ?

Hi there, cj. I can assist you in modifying an already-raised quotation in QuickBooks Online (QBO). 

We can always revise a quote in QuickBooks. Since the system doesn't recognize the quote number of an edited estimate, I recommend performing some basic troubleshooting steps to isolate the issue.

First, let's access QuickBooks through a private window, then edit the transaction. It'll help eliminate any cache-related issues that may be causing the problem. You can save time by using either of the following keyboard shortcuts:

• Google Chrome: Press Ctrl+ Shift + N
• Safari: Press Command + Shift + N
• Mozilla Firefox: Press Ctrl+ Shift + P

 If it works fine, return to your default browser and clear the cache to refresh the system. If you're getting the same experience, use another compatible browser to narrow down the result. 

I'm adding this article for additional tips while working with your quotes in QuickBooks: Create and send quotes in QuickBooks Online. The same reference will show you how to convert them into invoices.

If you have follow-up questions while modifying estimates/quotes in QBO, let me know by leaving a comment below. I'm just a few clicks away to help you again. Keep safe!