Procedure of deduction reversal.

Hello Experts,

Kindly provide your valuable inputs for my query. Like if user has been deducted 5000Rs. from employee's salary (Personnal loan deduction WT 1234) in month of oct. now they have to pay back RS.1000 in next month, against this bcz they have deducted 1000 extra.

So in the above schenerio what should be the standard solution? except retro.

Regards,