Problem Scenario:


Upon BIR Validation of MAP DAT File, users may encounter the error regarding Supplier Name like below image



Check the specific transaction in the MAP DAT File and trace it in the system

Check the Supplier in Supplier Maintenance

Notice that the BIR Classification is not set. Click the three-dot button to setup the BIR Classification of the Supplier

Company Name will be the one to reflect in your BIR reports. They may be different in Supplier Name for whichever purpose the user has (Supplier Name maintained is the alias known by the Company to that Supplier)

Regenerate MAP DAT File in WTax > Generate MAP DAT File



You may now notice that the Company set is being reflected

Revalidate the file using BIR Relief Validation and the error is now resolved