Witholding Tax Issue

Hi SAP Experts,

Need help please.

We are working in upgradation project. My issue is that we have few witholding tax that are been calcualted for Invoice Posting in the old system(4.7). Now when we have moved to global tempalte (ECC 6.0) here the issue is that the same withlding tax is configurated for Payment Posting which actually is correct.

Now all the vendor invoice where withlding tax are been calcualted for Invoice Posting (OLD SYSTEM), the same vendor when they are moved to Global template (new system) again during the time of Payment the witholding tax is been calcualted again.

So twice Withlding Tax is been calcualted for the same Vendor.

Can anyone tell me how to solve this issue.

Regards.