i cant log in - 400 bad request

Thanks for reaching out to us regarding the error 400 when logging in to QuickBooks Online (QBO), @dacapo.

I've checked and found no investigation related to the Bad request error at the moment. I know having this problem can be time consuming, especially when you already tried all possible troubleshooting. With that, I wanted to ensure you're connected to the right support to help you with this issue.

Here's how you can contact our Customer Service:

1. Go to the Help menu then choose the Search tab.
2. At the bottom click on Contact us.
   
3. Enter the keyword Account Management and Billing in the What can we help you with? box.
   
4. On the next screen, scroll down to How would you like to connect with us section.
5. Choose your contact option to initiate a discussion with a live agent.
   

In the meantime, if you have other devices, try and see if you can access your account.

Post here again for the result. I want to know if the troubleshooting worked for you or if you have other concerns with the other features in QuickBooks. I'll be right here anytime to assist you. Have a nice day!

Hell Jen,

thank you for trying to help me

I cant make it that far because I don't have access to any menu because the page doesn't load -> error 400

bad request .

Im a client not the server....

https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/400

Hello, dacapo.

Thanks for getting back to us. 

Since you're unable to login to connect with our chat, I'd love to help continue the troubleshooting in the Community to get you back into QuickBooks Self-Employed.

I see that you mentioned using multiple browsers and devices. Just to make sure we've covered all of our bases, have you tried to clear all the cache and cookies from your browser (all time option; the hyperlink points to QBO but this works for QBSE as well), and attempted to login using an Incognito or Private Browsing window? 

If you've tried these and you're still running into the issue, please let me know. I can submit a request to have someone reach out to further troubleshoot with you. 

Let me know if you have any other concerns. I'm always here to help. 

Thanks, it worked for me on chrome.