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Internal Revenue Service (IRS)

What Is Internal Revenue Service (IRS)?

The Internal Revenue Service (IRS) is the federal agency responsible for administering and enforcing U.S. tax laws. It operates under the U.S. Department of the Treasury and oversees tax collection, tax return processing, and compliance with federal tax regulations.

The IRS manages a wide range of responsibilities related to income taxes, payroll taxes, and tax reporting.

Why It Matters

The IRS plays a central role in the U.S. tax system by collecting tax revenue that funds government programs and public services. It also provides guidance, forms, and systems that individuals and businesses use to file taxes and comply with tax laws.

Understanding the IRS helps taxpayers navigate filing requirements, deductions, credits, and reporting obligations.

How the IRS Works

The IRS administers federal tax laws through several functions, including:

  • collecting federal taxes
  • processing tax returns
  • issuing tax refunds
  • auditing tax filings when necessary
  • providing tax guidance and resources

Taxpayers typically interact with the IRS when filing their annual tax returns or responding to tax notices.

Example

A taxpayer who files their federal income tax return using IRS e-File is submitting their tax information directly to the Internal Revenue Service.

IRS vs State Tax Agency

  • The IRS administers federal taxes.
  • State tax agencies administer state income and other state taxes.

FAQs About the IRS

What taxes does the IRS collect?
The IRS collects federal income taxes, payroll taxes, and certain business taxes.

Can the IRS audit taxpayers?
Yes. The IRS may review tax returns to verify accuracy.

Does the IRS issue tax refunds?
Yes. Refunds are issued when taxpayers overpay their taxes.

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