Internal Revenue Service (IRS) Definition

The IRS is the U.S. government agency responsible for tax collection and tax law enforcement.

Internal Revenue Service Extended Definition

The Internal Revenue Service (IRS) is in charge of tax laws and federal tax collections from individuals and businesses. The IRS is one of the U.S. Department of the Treasury bureaus.

Employers are responsible for withholding and remitting applicable payroll taxes (e.g., federal income tax) to the IRS and filing all necessary IRS forms (e.g., Form 941).

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