SAP Message 5M538 - Wrong exemption amount key &1. 1, 2, 3, 4, 8 or 9 were expected

Diagnosis
The exemption amount key is stored in this data record. It defineswhether the record applies to a weekly wage earner, 14-day wage earner,monthly wage earner, and so on. Altogether, there are five exemptionamount keys: 1, 2, 3, 4, and 5. The file contains the exemption amountkey <(>&<)>1, which the system does not recognize.

System Response
No tax infotype data was stored.

Procedure
Create an error message stating that that the file for creating taxdata records contains incorrect tax periods.