SAP Message 5C110 - Withholding tax data is not unique

Diagnosis
You have entered data in the "Amount" and "Percentage" fields. As aresult, withholding tax data is not unique.

Procedure
Enter data in just one of the "Amount" and "Percentage" fields. You canalso enter data in the "Scale" field in addition to one of the abovefields. In this instance, it is merely displayed in withholding taxevaluations. It is not used to calculate withholding tax in payroll.