Message type: E = Error
Message class:  ICC_CONDTAX - International Development: Condition-based tax calculation 
Message number: 054
Message text: Tax group &1 already exists with different fields
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The SAP error message ICC_CONDTAX054 indicates that there is a conflict with the tax group you are trying to create or modify. Specifically, it means that a tax group with the same identifier already exists in the system, but it has different field values or configurations. This can occur during the configuration of tax conditions in the SAP system, particularly in the context of tax calculation.
Cause: Duplicate Tax Group: You are attempting to create a tax group that already exists in the system with the same identifier (e.g., tax group code) but with different attributes or settings. Inconsistent Configuration: The existing tax group may have been configured with different fields or parameters that do not match the new entry you are trying to create. Data Migration Issues: If data has been migrated from another system or if there have been changes in the configuration, inconsistencies may arise.
Solution: Check Existing Tax Groups: Go to the
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