Message type: E = Error
Message class:  TXRG_POSTING - Tax Register Posting Message Class 
Message number: 104
Message text: Company Code is empty
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
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The SAP error message TXRG_POSTING104: Company Code is empty typically occurs when you are trying to post a transaction in SAP that requires a company code, but the system cannot find a valid company code in the context of the transaction. This can happen in various modules, such as Financial Accounting (FI), Controlling (CO), or others where company codes are essential for posting. Causes: Missing Company Code: The most straightforward cause is that the company code field is not filled in the transaction you are trying to post.
Configuration Issues: The company code may not be properly configured in the system, or the user may not have the necessary authorizations to access the company code. Data Entry Errors: There may be a mistake in the data entry process, such as not selecting the company code in a dropdown or input field. Transaction Type: The transaction type being used may not be linked to a valid
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