How to Change Your Nintendo Account on Switch
Note
- Profile information on a child's Nintendo Account can be changed through the child's account or through the parent/guardian's Nintendo Account.
- If you need to update information associated to your Nintendo Network ID (the account created on your Wii U or Nintendo 3DS family system), you may find our information on How to Change Nintendo Network ID Information (Email Address, Gender, Region, Etc) helpful.
Complete these steps
- Go to the Nintendo Account website and sign in to your Nintendo Account.
- You can also access your profile settings through the My Nintendo website by clicking your username in the upper-right corner, then My Nintendo Settings.
How to Change Your Nintendo Account on Switch
Source: https://en-americas-support.nintendo.com/app/answers/detail/a_id/15987/~/how-to-adjust-nintendo-account-profile-settings-%28country%2C-email%2C-etc.%29