bir123BIR 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) regardingBusinesses with RDO Nos. 116, 125, 126, 121, 124, 123, 127, etc., are considered large taxpayers. As such, they will be monitored by