Hi @4051737,
Welcome to TPG Community!
You may log on to TPG 'My Account' using your TPG username and password to change any account related information (except changing of ownership on the account).
You may also refer to this link for more details regrading accessing your account information:
TPG My Account - Accessing your account information online
For any additional assistance, please don't hesitate to let us know.
Cheers!
