How to add/edit a beneficiary to my 401k

HR cannot view your beneficiaries on your behalf. Therefore, if you need to view or edit them, you need to do it on your own.

Step-by-step guide

Log into ADP (https://workforcenow.adp.com/)
Click on myself, benefits, retirement savings.
It will take you to the mykplan website.
If you have not already enrolled, start the enrollment and it will prompt you during the enrollment to add your beneficiaries.
If you have already enrolled, click on the my account tab on your left.
Click on Manage Beneficiaries.
the system will guide you through the process to view and edit your beneficiaries.