Diagnosis
Positions 8, 9, and 10 of the 11-digit italian tax number contain afiscal province code. Positions 8, 9, and 10 of the entered tax number1 do not correspond to this province code.

Procedure
Check positions 8, 9 and 10 of the entered tax number 1. If necessary,also check the italian province entered in the 'Region' field.