You must define a processing variant for each different method of setting the payment date and then reckoning the vacation allowance amount.

The characteristics of each processing variant allow the table-driven generation of payment data and the effective payment of the vacation allowance.

Configure the characteristics of the processing variants, such as, payment date, vacation period and so, in the IMG step: HR-PT: Payroll Accounting / Vacation Allowance -> Vacation Allowance Processing (New Version) -> Maintain processing variants.