How to Reverting the Deducted amount from Payroll run for Late Leaver scenario

HI Experts,

Thanks for all your support...

I requires to achieve the business requirement for deduction Wage Type 9xyz from the It0014 which has to deduction from each pay period. I have achieved this T51p1 table to set the priorities for the Wage types for deductions. ( I have achieved through SPRO configuration).

But if an employee has been paid until July 2013 but he has applied the resignation from 30May2013.

I have ran the GRET schema to revert the Payment amount , I can see the Paid NET amount for last 2 months to achieve and is here any logic to payback the deducted wagetye amount for last two months.

Any help much appreciated in advance!!!!!.

Thanks,

RAM