What Is the Internal Revenue Service (IRS)? Definition & History

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The Internal Revenue Service has its own group of enforcers whose responsibility is to ensure that the tax code is upheld.

What Is the Internal Revenue Service?

The Internal Revenue Service, better known as the IRS, is the U.S. government agency responsible for collecting taxes from individuals and businesses, enforcing tax laws, and processing tax filings each year. It is also one of the oldest bureaus in operation, tracing its origins to the formative years of the republic.


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