SAP has delivered the HINCALTC report for reconciling the entries in tables V_T7INT9 and V_T7INA9. The report can be used to identify the invalid tax code wage type mappings for a particular allowance grouping. Resolving these erroneous configurations will ensure that correct exemptions are calculated in payroll for the respective allowances such as HRA, conveyance, gratuity, leave encashment and medical.
For more information, refer to SAP Note No. 2426635
The same information is available in PY-IN Troubleshooting Guide as well: