If a Subcontractor has sent their data to you through Data Control. You'll have to create a COMPASS account in order to view the data securely.
Creating a Data Control Account on COMPASS
Create your account by going to the Registration Page. As a security measure, the email you use to register must match the email that received the Data Control notice.
Next complete your COMPASS User Information. This will be your profile, and will help the sender identify who the data has been sent to.
After you've completed your User information, you should be directed to the Data Control "Shared With Me" page. For more information on accessing data shared with you, please see our article on Data Control - Receiving Data from Subcontractors