For all regular/individual Peerceptiv assignments, students can upload late submissions up until 24 hours before the Review deadline. Instructors do not need to enable this setting; it occurs automatically.
For group assignments, students must be part of a group before the submission deadline closes in order to submit late. If they are not already part of a group, they won't be able to join that group on their own to be considered part of the submission. Instructors can, however, add students to a group for them after the submission deadline closes and then that student will be counted as part of the group.
For Team Member Evaluation assignments and Training (Instructor Upload) assignments, students do not have to upload a submission, but they must complete reviewing before the Review deadline closes.