Message type: E = Error
Message class:  VKKTAX - FS-CD: Messages for Insurance Tax 
Message number: 124
Message text: TXPOS field or STRKZ was initialized
It is not permissible to post a document with a tax code for other taxes
(STRKZ) or with a tax reference (TXPOS) if a an insurance tax schedule
(INSTAXS) does not exist.
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 VKKTAX124 indicates that the TXPOS field or the STRKZ (tax indicator) was initialized, which typically means that the system is unable to find the necessary tax information for the transaction being processed. This error often occurs in the context of tax determination in sales and distribution (SD) or financial accounting (FI) modules.
Cause: Missing Tax Configuration: The tax codes or tax determination procedures may not be properly configured in the system. Incomplete Master Data: The customer or material master data may be missing relevant tax information. Transaction Data Issues: The transaction being processed may not have the necessary tax-related fields populated. Customizations: If there are custom developments or enhancements, they may interfere with the standard tax determination process.
Solution: Check Tax Configuration: Go to the transaction code OBYZ (for tax codes) and ensure that the tax codes are correctly defined. Verify the tax determination procedure in OBCL and ensure that it is correctly assigned to
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