federal ID number
noun[C]
TAXukus(alsofederal taxpayer ID number);(Employer Identification Number)anofficialnumberthat is given to abusinessby the USgovernmentinorderthat theamountoftaxthat thebusinessneedstopaycan becalculatedcorrectly:
To set up afederalIDnumber,contactyournearestlocalIRSfieldoffice.