Supplemental Info is a tab that appears in multiple areas of Kuali Research modules and it's a way for implementing institutions to collect and track fields of information that are unique to that institution. An institution has the ability to define custom attributes for the purpose of collecting additional information according to their unique institutional requirements. This is done via the creation and maintenance of Custom Attributes in maintenance documents; more information on this configuration can be found in the Custom Data Fields article. If an institution hasn't configured any custom data fields this tab will be blank. If a field is required it must be completed before the Subaward can be submitted.