You may update your Trusted Traveler Program (TTP) membership by logging into your online account at www.ttp.dhs.gov/. If you have an existing GOES account, you will need to create a new TTP account then sync your account using your membership/PASSID number or old GOES user ID.
After successfully logging in, you may update your passport details by clicking on "Update Documents" on your right hand side in your Dashboard.
You will be directed to enter your passport details here;
Upon entering all of your new passport details, you may click Submit to save your details.
You're all set, your account has been updated!