From the drop-down lists, select an email address. So, you'll be emailed a token to reset your password.
Enter the token you received.
On the other hand, if you're using QuickBooks2019 and earlier, you'll have to fill out the information on the form. You can log in to the Customer Account Management Portal (CAMPS) to find and get the information asked when resetting the password. From there, you can get the license number for the version of QuickBooks Desktop you’re using.