Should an employee require updates on his/her Working Schedule, you require to reprocess the period from which the new schedule should take place to effect the changes in the Approvals section.

Step 1: Launch the WorkForce Timekeeper module, click on Approvals from the left-hand side menu, and then on By Employee.

Step 2: Choose the date from, date to, and the employee and click on Refresh. 

Step 3: Click on the Reprocess Period button at the bottom of the screen