Hello there, Peter.
I appreciate you coming to the thread and clarifying what you conducted. I'll provide details on how the QuickBooks accounts you've used work on your Intuit account page. I'll also ensure you'll be routed to the right support team to assist you further on this matter.
Please note that all active and inactive QuickBooks accounts are displayed on the Products & billing tab. You will then be able to select the account you used in 2016 and change the username to something different from your current account from there.
However, if you have already visited the mentioned section above and are still only able to view the new account, I recommend contacting our QuickBooks Support team. They're the best support group for such inquiries as they can request account information. This allows them to determine why your current account login and an account you last used in 2016 display when logging into your current Intuit Account.
Lastly, you can read this article if you need to see different sign-in tips and troubleshooting in QuickBooks: Recover your Intuit Account if you canβt sign in.
I'll always be around in this forum if there's anything else you need further assistance with managing your account sign-in credentials. Just keep me posted below, so I can get you covered. Stay safe and have a great day ahead, Peter.
