Solution : https://service.sap.com/sap/support/notes/958424 (SAP Service marketplace login required)
Key words :
goto transaction sm30, transaction sm30, business partner, tax number 2, error message, tax number1, lfa1-stenr, info message, warning message, customizedto insert
Related Notes :
| 1258241 | BP:Tax Number:Incorrect error message on deletion of IT2-III |
| 1256817 | BP: TaxNumber: Incorrect error message on deletion of IT2-II |
| 986686 | Business partner data terminates with wrong tax number input |