Message type: E = Error
Message class:  FKKINV - Invoicing in Contract Accounts Receivable and Payable 
Message number: 062
Message text: Tax determination code &1 is unknown
The <DS:DE.ERMWSKZ>tax determination code</> &v1& is not known for
<DS:DE.LAND1>country</> &v2& for key date &v3&.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FKKINV062 indicates that the tax determination code specified in the system is unknown or not defined. This error typically occurs in the context of invoicing or billing processes within the SAP system, particularly in the area of contract accounts receivable and payable (FI-CA).
Cause: Missing Tax Determination Code: The tax determination code that is being referenced in the transaction does not exist in the system.
Configuration Issues: The tax determination code may not have been properly configured in the system. Incorrect Input: The user may have entered an incorrect or invalid tax determination code in the transaction. Master Data Issues: The master data (such as customer or vendor master records) may not be set up correctly, leading to the system not being able to determine the appropriate tax code.
Solution: Check Tax Determination Code: Verify that the tax determination code being used is correct. You can do this by checking the relevant configuration
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