bir123Businesses with RDO Nos. 116, 125, 126, 121, 124, 123, 127, etc., are considered large taxpayers. As such, they will be monitored byBIR Ruling No. 123-2018 - Free download as PDF File (.pdf), Text File (.txt) or read on for free. The document discusses a ruling by the Bureau of Internal Revenue (BIR) regarding