|How do you know for sure if you have a TIN|
The best thing for you to do is to call the BIR Contact center at 981-8888 or email firstname.lastname@example.org or call Taxpayer Information & Education Division 981-7000 local 7250 / 7251 / 7252. They will ask your full name and your birth date. Do ask also which RDO or BIR branch where your TIN is currently registered. RDO stands for Revenue District Office of the BIR. These RDOs have areas that are under their jurisdiction. So if your TIN is registered in RDO 40 – Cubao or RDO 45 – Marikina.
Do take note that the office of RDO 40 is not actually located in Cubao. Rather it is just the RDOs area of jurisdiction which not only includes that area but also part of Libis, Project 4 etc. Listed in the BIR Website. Anyway, for the location of your RDOs. On the left side of this blog provides a link to the BIR directory which includes location of your RDO.