You can edit a learner’s result including the compliant date by going to the “Courses” tab. Once there, you can open a course and select the “People” sub-tab to locate the learner and click on the "edit result" link.
Either select the module you would like to edit and click "edit" or select "Set status as Complete" near the top of the page. Once the module has been marked complete it will be issued a Compliant Until date. Select the calendar next to this date to change the Compliant Until requirement.