Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 066
Message text: 'Tax code not a required field' differs for &1 and &2 in company code &3
For either account &V1& or &V2&, the tax code is not a required entry
field in company code &V3&.
This is determined by the indicator <zk>Tax code is not a required field
</> (field SKB1-XMWNO).
These accounts are to be converted into account &V4&.
The conversion can take place anyway.
The mapping table may have to be adapted.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100066, which states that "Tax code not a required field" differs for &1 and &2 in company code &3, typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an inconsistency in the tax code settings for the specified company codes.
Cause: Inconsistent Tax Code Settings: The error usually occurs when the tax code is not consistently defined as a required field across different company codes. For example, in one company code, the tax code might be set as mandatory, while in another, it is not. Data Migration Issues: During data migration, if the source data has different configurations for tax codes across company codes, it can lead to this error. Configuration Differences: The configuration settings in the SAP system for tax codes may differ between the company codes involved.
Solution: Check Configuration: Review the tax code
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