Message type: E = Error
Message class:  FICUSTOM - Customizable Messages for Funds Management 
Message number: 340
Message text: Withholding tax info in master record &1 missing: Check wthldng tax &2
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The SAP error message FICUSTOM340 indicates that there is missing withholding tax information in the master record for a specific vendor or customer. This error typically arises when you are trying to process a transaction that requires withholding tax information, but the necessary data is not available in the master record.
Cause: The error occurs due to one or more of the following reasons: Missing Withholding Tax Type: The withholding tax type specified in the transaction is not maintained in the vendor or customer master record. Incomplete Master Data: The vendor or customer master record does not have the required withholding tax information filled out. Incorrect Configuration: The withholding tax configuration in the system may not be set up correctly, leading to missing links between the tax type and the master record.
Solution: To resolve the error, you can follow these steps: Check Vendor/Customer Master Record: Go to the vendor or customer master record (transaction codes like XK03 for
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