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English definition of “federal ID number”

federal ID number

noun [C]     (also federal taxpayer ID number, Employer Identification Number) TAX
an official number that is given to a business by the US government in order that the amount of tax that the business needs to pay can be calculated correctly : To set up a federal ID number , contact your nearest local IRS field office .
(Definition of federal ID number noun from the Cambridge Business English Dictionary © Cambridge University Press)
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