The Excess amount of festival advance seen as deducted through salary. How to refund it?

If the festival advance is deducted as excess, then please go through, Salary Matters>>>Processing>>>Other Allowances>>>Sanction Order Details [Select the allowance item as “Refund of Onam Advance (202)]. Then process the bill through, Salary Matters>>>Processing>>>Other Allowances>>>Other Allowance Processing option.