Hello, I can't update a new item on a quote.

Let me help you from here, Emmanuelazzopard.

I'd like to know more about this, though. Did you encounter any error messages when you try to edit the quote? It'll help me check our records for any open investigations that might be similar to your concern.

In the meantime, we can try basic troubleshooting to fix your issue. Let's start with logging into your account through a private browser. It's the best place to identify browser hiccups. These are the shortcut keys:

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

If you can update the quote successfully using the private browsing session, go back to your regular browser and clear its cache to refresh the program. 

Also, you can use a different browser to narrow down the issue.

I'll add this article to help you manage your quotes: Create and send quotes in QuickBooks Online.

Feel free to get back to this thread with more information. We'll be right here to assist you. Take care!