Rebate credit note process in A/R.

Hello all,

We have scenario where we need to print & pay the taxes (central excise duty) to government but at the same time we need to issue credit note to customer for that amount , because that amount is refunded by government ...for example

Customer XYZ     Invoice basic     USD 1000.00

Custom/Excise Duty                      USD    100.0

Total                                               USD 1100.00

Now we need to pass credit note to customer account for $ 100.00

**Custom/Excise Duty receivable A/C Dr. USD 100.00

     TO Customer XYS A/c                 Cr. USD               100.00

Please suggest if any Rebate process or any automatic process is there which  automatically pass **above entry in system.

Thanks,