Step 1: Go to the employee's profile and click their Time Off card. Then click Manage Balances.
Step 2: You will then be taken to the Balances page (hint: from here you can make mass updates to all of your employee's balances). Click the Edit Balances & Accruals link
Step 3: You will then be able to adjust the Current Balance. Put in the correct amount of hours the employee should have and click Save.