Looking for a solution on Value Set for a DFF

Summary:

Hi Experts,

We are looking for a solution to one of our configuration requirements. Below is the set of problem summary.

Current Scenario: We have DFFs (Vacation/PTO Hours Owed to Employee) and (Remaining Holiday Pay) under Termination Action Page. We don't default values currently on these fields. It is a text box and manually user has to enter accrual values.

Requirement and Solution We are looking for : How we can default accrual values on these two DFFs while we terminate an employee? These two fields are also available under Person Extra Information under Manage Person. How can we create a value set based on Employee's accrual information for these two DFFs?