Message type: E = Error
Message class:  HRGB_GBRTI - Messages for RTI 
Message number: 133
Message text: Tax Regime can only be &1 or a blank
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The SAP error message HRGB_GBRTI133, which states "Tax Regime can only be &1 or a blank," typically occurs in the context of payroll processing or tax configuration in the SAP Human Capital Management (HCM) module, particularly for the UK payroll.
Cause: This error indicates that the system is expecting a specific value for the tax regime field, which can only be a predefined value (often '1' for a specific tax regime) or left blank. If the value entered does not match the expected values, the error will be triggered. Common causes include: Incorrect Configuration: The tax regime field may have been incorrectly configured in the employee's master data or payroll settings. Data Entry Error: An incorrect value may have been manually entered in the relevant field. Integration Issues: If data is being imported from another system, the mapping may not be correct, leading to invalid values being passed to SAP.
Solution: To resolve this error, you can
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