There is a glitch with the login cookies here: https://selfemployed.intuit.com/loginI frequently get a 400 response, "Bad Request." It always works incognito. Fix pls?

@michaelmarvosh  Yeah, that's not going to happen.

https://quickbooks.intuit.com/learn-support/en-us/other-questions/anyone-find-a-solution-to-the-cache-stuffing-problem-with-qboa/00/1537282

As far as I know, all of QB's online offerings suffer from cache issues. It's a feature, not a bug.

A Bad Request Error 400 in QuickBooks Self-Employed (QBSE) signals an issue with the request being sent to the server, @michaelmarvosh. You can clear your browser's cache or use another supported browser for QBSE to get this fixed. Allow me to discuss this with you below.

To start, I appreciate you providing a detailed description of your concern. Addressing cache-related problems by clearing your browser's cache can resolve this issue and help prevent it from recurring.

Here's how:

1. Open your Chrome browser.
2. Click the three-dot icon at the top-right corner and select Delete browsing data.
3. Choose a time range, like Last hour or All time.
4. Select Cached images and files.
5. Click Delete data.
    

You can refer to this article for how to clear cache in other browsers: Clear cache and cookies to fix issues when using QuickBooks Online.

For additional details, you can also use other supported browsers that work perfectly with QuickBooks Self-Employed.

Additionally, refer to this article to help you prepare to file your taxes: QuickBooks Self-Employed Annual Tax Guide.

If you need further assistance with accessing your QuickBooks Self-Employed (QBSE) account, don’t hesitate to let me know in the comments below. We're always here to lend you a hand whenever you need it.