Glad to have you join the QuickBooks family! I'll be happy to show you how to delete the other account.
Note: If you can't sign in, you should reset your password.
If you're cancelling your free trial:
The following steps are for if you have a subscription:
Once you're done, we'll send the account administrator an email that confirms we cancelled your subscription.
If your account is suspended, you need to resubscribe before you can cancel. Or, we’ll cancel your subscription after three failed attempts to charge your payment method.
Learn what happens to your data after you cancel
Tip: Consider printing forms and reports you might need in the future.
Give this a try and if you're still having issues, I recommend contacting our support team using this link.