How to Know Your BIR RDO Code: 3 Ways.
- Check your BIR Form 1901/1902/1903/1904/1905. Look for a copy of the BIR form you filed when you applied for a TIN. …
- Contact the BIR hotline. You may inquire about your RDO code by calling the BIR’s Customer Assistance Division. …
- Visit the nearest RDO.