SAP Message AR170 - Check the provincial tax code in tax code 2 (nnnnnnnxxxn)

Diagnosis Positions 8, 9, and 10 of the 11-character Italian tax number contain aprovincial tax code. Positions 8, 9, and 10 of the tax number 2 entereddo not correspond to this provincial code defined for region &V1&. Procedure Check positions 8, 9 and 10 of the tax number 2 entered. If necessary,also check the entry in the 'Region' field.