After you file

Do you mean your employer's Federal ID?  You will find it on your W-2 when the employer issues it.  They have until February 1 to issue your W-2.  Slow down and do not be in a rush to file.  The IRS will not be accepting returns until the end of January.

**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**