my friend can’t access to her account due to wrongly enter the year of birth

One of my friend, she can't access to her account because she wrongly entered her year of birth on her account profile. 

Therefore, when she has accessed her account, it always shows that she needs the parent permission before she could sign-in.

However, she is an adult already. Do you have any suggestion about this problem? Or how could she change her detail on her account profile

without log-in? Or where could she prove herself about her age so that she could use her account normally? 

Thank you,

Kwan