text: how will i know my tin no. from the bir? i don't know my tin no. i want to verify my tin no. fron the bir the most important part of a question is that it be understood, not that it be answered.   tax itentification numbers are issued by the federal government, so contact the irs.  they will, with approriate verification and identification, let you know the tin that was issued.  this has nothing to do with the bir.  i would not wish to impose on you. sometimes we just don't know what to do.  so keep asking questions. know that you are a very special person, a very intelligent person who can make a difference and make our world a better place