User Exit for higher deduction of WHT for Non PAN Vendors

Hi

There is some user exit for deducting WHT at higher rate if Vendor master does not have PAN number. By applying this user exit, SAP automatically deducts WHT at higher rate if vendor does not have PAN number

I do not remember that user exit / SAP Note which mentions about this user exit.

Please help and let me know user exit / SAP note number