To change personal information on TreasuryDirect, account holders can log into their accounts by visiting the TreasuryDirect website and using their credentials to access the online platform. Once logged in, guidance is available for updating various pieces of personal information. The account holder should look for the appropriate section related to personal or account information, where they can edit details such as their name, address, or contact information. It is important to follow any specific instructions provided on the site to ensure changes are processed correctly. The online platform may require verification for certain updates, particularly for sensitive information. If a change involves a change of name, additional documentation may be necessary, so it is advisable to familiarize oneself with any requirements mentioned in the guidance. For comprehensive instructions tailored to specific situations, users can refer to the relevant sections on the TreasuryDirect website, where helpful information is presented.