How to change my age because it is wrong

Hi there, see this instructions to change your date of birth on your Apple ID

1. Go to Settings > [your name].
2. Tap Name, Phone Numbers, Email. You might need to enter your Apple ID password.
3. Tap Change Birthday or Birthday. 
4. Update your birth date, then tap Done. If you're changing a birth date for a child, learn what to do. 

If you're under 13 years of age, see this instructions

To change a birth date to any age below 13,* you must be a member of a Family Sharing group, and your family organizer must approve the change. After you change a birth date to any age below 13, you can't edit it.* Learn more about Family Sharing. 

1. Update the birth date.
2. Follow the onscreen steps to send an email request to your family organizer.
3. Your family organizer will get an email with instructions to approve the request. 

See this link for further reference

Update the birth date associated with your Apple ID - Apple Support

Click here and follow the instructions; if an incorrect date puts you underage, use the link to contact Apple Support.

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