https://userapps.support.sap.com/sap/support/knowledge/en/2936189
2936189 - MIR5: Missing withholding tax data - SAP ERP & SAP S/4HANA | SAP Knowledge Base Article
An invoice document is posted with withholding tax. When the document is opened via the transaction MIR5, the Witholding tax data (withholding tax base,...