Hi,
I want to implement an exit on Tax number 1 (LFA1-STCD1), tax number 2 LFA1-STCD2), VAT Reg. no (LFA1-STCEG) so that if user try to create another vendor with the same values system will replies with an error.
Do I have only to set an user exit or is necessary to customize the Set Country-Specific Checks ?
What is the user exit ?
Regards