Many assignments and quizzes in LoudCloud allow for late submissions, however, all assignments and quizzes close at the end of the course. Assignments and quizzes cannot be submitted after the course end date. The New Attempt button will no longer be selectable at this time, and the instructor will not be able to reassign assignments. It is at the discretion of the instructor whether they will choose to allow late submissions after the course end date or not. This is true for all versions of LoudCloud.
You will also not be able to post in any of the forums, including the Individual Forum. Correspondence is always an option by email, though. Have a look at our Help Center article on contacting your instructor!