The HSS is automatically populated by human subjects and clinical trial data entered by the principal investigator on the Human Subjects and Clinical Trial Information form in applications submitted for due dates of January 25, 2018 and beyond. This data is then made available to PIs and signing officials through a link that will be available on the eRA Commons Status screen and the Research Performance Progress Report (RPPR).
See the electronic Research Administration's Human Subjects System (HSS) — An Overview webpage.