How to restrict one vendor to post only by one tax code? SAP FI AP

[Former Member]

Hi guys, I would like to restrict one vendor whlie creating dokument to post only with one tax code.

[Former Member]

I made it with substitution:

prerequisit for example :BKPF-BLART = 'KR'

and substitution to change text in dokument on: BSEG-BLART "Change tax code on D2!!!"

and active rule: RULE01: BSEG-LIFNR = '1000000945' AND BSEG-MWSKZ = 'D2'

I offer users to do it with sets because it easy to manipulate. But can someone offer me a better decission that will gave me just a message, not to stop the whole posting procedure.

[Former Member]

I check all the fields in master data of vendor but didn't find anything. I try with substitution and validation but no result.