You can change the email address associated with your Quizizz account from the settings tab on the left navigation menu.
If you have accidentally created a new account with your new email address and unable to access your old account, please reach out to support.
1. We do not support merging of two Quizizz accounts.
2. We can update the email address for your old account with your new email address so that you can access all your quizzes and reports.