How To Fix AJ635 - Tax determination group &1 is inconsistent

SAP Error Message - Details

• Message type: E = Error

• Message class: AJ - Billing program

• Message number: 635

• Message text: Tax determination group &1 is inconsistent

What causes this issue?

A <DS:DE.TAXGROUP>tax determination group</> must be used as follows in
the <DS:DE.STEPINACT>active</> steps of the billing schema:
There must be just one schema step with a variant from category 17
(variant is written with a tax determination quantity).
There must be at least one additional schema step with another variant
category.
This is not the case with tax determination group &V1&:
Number of steps with a variant from category 17: &V2&
Number of steps with other variants: &V3&

System Response

The billing schema is inconsistent and cannot be saved.

How to fix this error?

Correct the usage of tax group &V1&.

Procedure for System Administrators

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message AJ635 - Tax determination group &1 is inconsistent ?

  The SAP error message AJ635, which states "Tax determination group &1 is inconsistent," typically arises in the context of tax determination in the SAP system. This error indicates that there is an inconsistency in the tax determination group configuration, which is crucial for calculating taxes correctly in transactions.
  Cause:
  
  Missing Configuration: The tax determination group may not be properly configured in the system. This could mean that the group is not assigned to the relevant master data (like customers or vendors) or that the necessary tax codes are not linked to the group.
  Inconsistent Data: There may be inconsistencies in the data related to the tax determination group, such as missing entries in the tax configuration tables.
  Changes in Tax Codes: If tax codes have been changed or deleted after they were assigned to the tax determination group, this can lead to inconsistencies.
  Customizations: Custom developments or modifications in the tax determination logic may lead to inconsistencies if not properly aligned with standard configurations.
  
  Solution:
  
  
  Check Configuration: 
  
  Go to the transaction code OBYZ (or the relevant transaction for tax determination configuration) and verify the settings for the tax determination group in question.
  Ensure that the tax determination group is correctly assigned to the relevant master data (customers, vendors, etc.).
  Check if the necessary tax codes are assigned to the tax determination group.
  
  
  
  Review Master Data:
  
  Check the master data records (like customer or vendor records) to ensure that the tax determination group is correctly assigned and that there are no missing entries.
  
  
  
  Validate Tax Codes:
  
  Ensure that all tax codes linked to the tax determination group are valid and active. If any tax codes have been deleted or changed, update the tax determination group accordingly.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or notes related to tax determination to ensure compliance with the latest configurations and best practices.
  
  
  
  Testing: 
  
  After making changes, perform tests to ensure that the tax calculations are now functioning correctly without errors.
  
  
  
  Consult SAP Support: 
  
  If the issue persists after checking the configurations and master data, consider reaching out to SAP support for further assistance. They may provide specific notes or patches that address known issues related to tax determination groups.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OBYZ (Tax Determination) and OBCO (Tax Codes) for configuration checks.
  SAP Notes: Search for SAP Notes related to tax determination issues, as they may provide insights or solutions for specific scenarios.
  Documentation: Review the SAP Help Portal for detailed documentation on tax determination and configuration best practices.
  
  By following these steps, you should be able to identify and resolve the inconsistency related to the tax determination group in your SAP system.