Absence mangement self-Service HR R12.1.3 how to update PER_ABSENCE_ATTENDANCES table

In employee self-service absence management, I click on the ‘create absence button and enter the leave details and choose leave status as ‘confirmed’. I press the ‘Next’ button and finally submit the leave. The leave is going to immediate manager to approve it. The manager approves the leave and leave details are stored in the HR Core table and populated on the core absence screen.  When I see the absence screen, I find that ‘Projected dates’ and ‘Authorized By’ is not updated. Now I want to update the PER_ABSENCE_ATTENDANCES table with the following information.

a.       Projected Start Date=> Actual Start Date