Appreciate the time you've taken in sharing your experience, @lukaszkot. I want to ensure this matter is addressed timely by sharing additional insights about multifactor authentication in QuickBooks Online.

To begin with, the captcha and code system is one of the needed authentications upon logging in to your account for security reasons. Yes, two-factor authentication mostly happens for fresh login attempts.

Have you performed some troubleshooting recently, like clearing the cache of the current browser you're using? This can be the reason why the multifactor authentication has been triggered and you're asked to complete the process upon logging in to your account.

On that same page, the preferences you made for the accounts displayed upon successful logins can be removed along with the settings made after performing a few troubleshooting steps.

Meanwhile, several factors as described above may trigger additional login confirmation to ensure you're logged in with trusted credentials. And, no browser settings to set up these preference since Intuit products is not in control of these factors.

For now, I'm including this reference so you're able to use all the features and functions of QuickBooks: Help Articles in QuickBooks Online. Also, you're able to read subtopics that will describe how a feature is used and how to accomplish tasks related to its functions.

If you have any other questions about logging in to your account and working with the features in QuickBooks, please let me know in the comments below. Don't forget to include my name, @JonpriL, in your follow-up response and I'll be here to lend a helping hand.