thank you for your prompt response. However, I contacted Intuit support and they recommended likewise: clear cache, restart browser etc.. The result was: It works for a day, but after the machine is rebooted or browser restart, it STILL prompt for code. and again will prompt each time it logs oout (as you can see in this thread, many users are saying multiple times a day). And we CANNOT clear the cache each day! As we all have dozen of sites that work well with remembering the logins, so why should QB be adding more pain to all of them.

It's actually quite simple, QB login page should have a check box to "remember/trust this device" and the code behind to make that it does with the right cookies.