The University has an online Virtual Learning Environment called Blackboard.
Each module you study will have associated material on Blackboard, including important information about assessment. Blackboard should be your first port of call for any information related to teaching. Submission of work is made via module pages in Blackboard, and grades and feedback are also accessed there.
If you need any help with Blackboard, your first enquiry should be to the Department's Learning Technology Manager, Bryony Olney. You could also check the information provided by the University's Digital Learning team: Blackboard for Students.