The TurboTax online editions are only for one tax return per account and User ID.
If this other person has their own TurboTax online account with a separate User ID then they can change any of their information on their account.
See this TurboTax support FAQ for updating a TurboTax account - https://ttlc.intuit.com/community/account-updates/help/how-do-i-update-my-turbotax-account-informati...
