Follow below steps to to register DSC on EPFO Website:-
Prerequisites to register DSC on the EPFO portal:
Valid Class 3 DSC along with USB Token.
Installed DSC software.
User ID and password to login to the portal.
Step 1: Log in to Unified Employers Portal. Then click on the Establishment drop-down menu and select DSC/e-SIGN.
Step 2: Enter details of the authorized signatory such as name, designation and mobile number. Choose Sign with your USB Token and click on Submit.
Step 3: A popup will appear with the message Do you want to run this application ? Click on Run.
Step 4: Now, the DSC details of the authorized signatory will be displayed. Select the DSC and click on Register DSC.
Step 5: Enter the user PIN given to you by the DSC provider and click 'OK' to complete the registration process.