Once a student has been admitted, it is easy to edit a student's data in USM via its Admission Module, which is accessible via the Menu Bar on the top right of the dashboard screen. Currently, you can only edit the Admission Number and Admission Date of a given student.
Step 1. Click on the Admission Module under the Menu Bar. 
Step 2. Click on the Manage Admission Data from the left sidebar on the screen. 
Step 3. Select the Academic Session and Class of the given student, whose data is to be edit.
Step 4. Make the required changes and click on the Save option next to the student whose data has been edited.
Note : In case of changing the admission number, make sure the new admission number isn't already allotted to some other student. 