To submit a maintenance request using eMaint.com, users must first log in by typing emaint.com/login.php into their browser and entering their branch account credentials. They can then click "Add New Request" to fill out a form with required details of the issue. Users can also attach a photo by clicking "Image" and selecting a picture from their computer. Once completed, clicking "Save New Request" will submit the maintenance ticket. The request will then be visible under "Open Work Requests" once processed.