If you are under 13 years old (or below the cutoff age for requiring parental consent in your country), you will need a parent or guardian to provide their permission for you to take the test.
Your parent or guardian can contact support to give their permission using the orange HELP button on our site or by emailing englishtest-support@duolingo.com. Their message should include your full name and the email address that you will be using for your Duolingo English Test account.