Step 0- Login as "Admin"
Step 1- Go to "Dashboard" click on "Student" module
Step 2- Click on "Administration" Click on "Student"
Step 3- Select "Class and Student", Click on "Edit" button Tick on "Have Sibling" and "Add" sibling details
Step 4- Click on "Have Sibling" and Search Student
Step 5- "Add" sibling details Click on "Update Student"

Remove Sibling
Step 1- Go to "Administration" click on "Download" module
Step 2- Click on "Sibling" search "Parent Name" click on "Green" button (on Right Side)
Step 3- Click on "Remove Sibling" click on "Save" button