Step 1: Go to Transactions tab then select the Leave module 

Step 2: Find the request that you want to edit (Note: Only requests with PENDING status can be edited) 

Step 3: Click the "Check Box" on the first column of the Leave request (Actions on top will be highlighted/enabled) 

Step 4: Click the "Edit" button then update the details of Leave Request 

Step 5: Click the "Submit" button