Bir-1601e on BIR Online Toolshttps://bir-online-tools.com/blog/tags/bir-1601e/Recent content in Bir-1601e on BIR Online ToolsHugoenBIR Online ToolsMon, 15 Jan 2024 00:00:00 +0000Your First Excel to DAT Conversionhttps://bir-online-tools.com/blog/posts/first-excel-conversion/Mon, 15 Jan 2024 00:00:00 +0000https://bir-online-tools.com/blog/posts/first-excel-conversion/How to prepare an Excel file, upload it to the BIR Online Tools converter, map columns, fix validation errors, and download a BIR-compliant DAT file.