I can't do NE-thing w/ my very first invoice . I get error message: Something's not quite right Unable to load https://c40.qbo.intuit.com/qbo40/neo/.........Status 400?

Hi there, john19.

This error might be caused by a browser-related issue. We have a few basic troubleshooting steps that you can perform.

First, open your QuickBooks company in an incognito window or private browser.

Here are the keyboard shortcuts:   

1. Chrome: Press Ctrl + Shift + N
2. Mozilla Firefox: Press Ctrl + Shift + P
3. Internet Explorer: Press Ctrl + Shift + P
4. Safari: Press Command + Shift + N 

Then, try saving your invoice again. If it's successful, let's clear your regular browser's cache and close it entirely. This will reset the browser settings back to default.

Once done, re-open your regular browser and try saving the invoice. If you get the same result, we can add QuickBooks as a trusted site.

Alternatively, you can try using a different browser such as Internet Explorer or Firefox.

If you have any additional questions or concerns about QuickBooks, please let me know. Thanks.