The IRS is the federal agency that collects income taxes and enforces tax law

The Internal Revenue Service (IRS) is a bureau of the U.S. Department of the Treasury. Its job is to collect federal income taxes from individuals and businesses, and to enforce the tax code — the rules about who owes what and when. The IRS processes tax returns, issues refunds, investigates fraud, and pursues people who owe back taxes.

Most people encounter the IRS once a year when they file a tax return. But the agency also runs programs that deliver money to households — like the Earned Income Tax Credit and the Child Tax Credit — which work through the tax system even though they are really benefit programs. Understanding what the IRS is and what it controls helps you know where to look when you need information about tax-related benefits or when you owe money.

Key Takeaways

  • The IRS collects federal income taxes, processes returns, and issues refunds; it is part of the U.S. Department of the Treasury, not a separate agency.
  • The IRS administers tax credits like the Earned Income Tax Credit and Child Tax Credit, which put money into the pockets of low- and moderate-income households.
  • You contact the IRS directly if you need to dispute a tax bill, report a change in income, or find out why your refund is delayed.
  • The IRS has regional offices and a phone line, but most routine questions are answered through their website or by mail.

How the IRS collects taxes and processes returns

When you work, your employer withholds federal income tax from your paycheck and sends it to the IRS. If you are self-employed, you pay estimated taxes directly. At the end of the year, you file a tax return that tells the IRS how much you actually owe based on your total income, deductions, and credits. The IRS compares what you paid during the year to what you owe; if you paid too much, you get a refund; if you paid too little, you owe the difference.

The IRS processes millions of returns each year. Most are handled by computer; if the IRS has questions about your return, it will contact you by mail. Processing times vary depending on whether you file electronically (usually faster) or by paper, and whether your return is straightforward or complex. A typical refund takes two to three weeks if you file electronically and provide direct deposit information.

Tax credits that put money in your pocket

The IRS administers several programs that work like tax refunds but are really benefit programs. The Earned Income Tax Credit (EITC) is the largest: it gives money back to working people with low to moderate income, even if they owe no tax. The Child Tax Credit reduces the tax owed by parents and guardians, and the refundable portion means some households get money back even if they owe nothing. The Child and Dependent Care Credit helps pay for childcare costs.

These credits are claimed on your tax return. You do not apply for them separately; instead, you report the information the IRS needs on the form, and the IRS calculates whether you may have access to and how much you receive. If you think you might be may have access to to a credit but have not filed a return in years, you can still file a return to claim it — the IRS allows you to go back three years.

When you owe back taxes or the IRS contacts you

If you owe taxes and do not pay, the IRS can place a lien on your property, garnish your wages, or seize your bank account. The agency will contact you first, usually by mail, giving you time to respond. If you cannot pay in full, you can set up a payment plan with the IRS — either a short-term plan (120 days or less) or a long-term installment agreement.

If the IRS sends you a notice about a tax bill you believe is wrong, you have the right to dispute it. You can respond by mail within the deadline shown on the notice, or you can request a hearing with the IRS Office of Appeals. Do not ignore an IRS notice; responding protects your rights and can stop collection action while your case is reviewed.

How to contact the IRS

The IRS has a main phone line (1-800-829-1040 for individuals) that is open during tax season and year-round. Wait times are often long, especially during tax season. For many routine questions — checking refund status, getting a transcript of your tax return, or understanding a notice — the IRS website (irs.gov) is faster and available 24 hours a day.

The IRS also has local offices in most cities. You can walk in without an appointment to ask questions or get help with a notice, though wait times vary. If you need help understanding a complex tax situation or want representation in a dispute, you can hire a tax professional — a CPA, enrolled agent, or tax attorney — to communicate with the IRS on your behalf.

The difference between the IRS and other tax agencies

The IRS handles federal income tax only. Your state and some cities also collect income tax, and those are handled by separate state and local tax agencies. If you owe state tax, you contact your state's revenue or tax department, not the IRS. Property tax and sales tax are also separate systems run by local governments.

The IRS is also different from the Social Security Administration and the Department of Veterans Affairs, even though all three deliver money to households. The IRS delivers tax refunds and tax credits; Social Security and VA deliver benefits based on work history or military service. If you need information about Social Security or VA benefits, you contact those agencies directly, not the IRS.

Frequently Asked Questions

How long does it take to get a tax refund?

If you file electronically and choose direct deposit, most refunds arrive within two to three weeks. Paper returns take longer — usually four to six weeks. You can check the status of your refund on the IRS website using the "Where's My Refund?" tool, which updates once a day.

What happens if I don't file a tax return?

If you owe tax and do not file, the IRS can assess the tax and add penalties and interest. If you are owed a refund, you can still file a return to claim it, but you must file within three years or you lose the refund. If you cannot file on time, you can request an extension from the IRS.

Can I set up a payment plan if I owe the IRS?

Yes. The IRS offers short-term plans (up to 120 days) at no cost, and long-term installment agreements with a setup fee and monthly payments. You can request a plan by phone, mail, or through the IRS website. The IRS will work with you to set a payment amount you can afford.

Do I need to hire a tax professional to deal with the IRS?

No. You can represent yourself in most situations. However, if you are in a dispute, owe a large amount, or have a complex tax situation, a tax professional can save you time and money. The IRS website also has free resources and a phone line for people who cannot afford professional help.