The IRS is a 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. It collects federal income taxes from individuals and businesses, processes tax returns, and investigates people and companies that do not pay what they owe. The IRS also administers tax credits and refunds — money the government owes back to taxpayers.
The IRS is not a private company, a bank, or a loan service. It is a government agency with the legal power to audit your records, seize assets, and pursue criminal charges for tax fraud. Most people interact with the IRS once a year when they file a tax return, but the agency also handles ongoing compliance for businesses, manages retirement account rules, and responds to disputes about how much tax you owe.
Key Takeaways
- The IRS is part of the U.S. Department of the Treasury and collects federal income taxes from individuals and businesses.
- The agency processes tax returns, issues refunds, and enforces tax law through audits and penalties.
- You can contact the IRS by phone, mail, or through its website at irs.gov, but wait times are often long.
- The IRS does not initiate contact by text, email, or social media — scammers use these methods to steal personal information.
- If you owe back taxes or disagree with an IRS decision, you have formal appeal rights and can request a payment plan.
How the IRS collects taxes and processes returns
When you file a tax return, the IRS receives it either electronically or by mail. The agency scans the return, matches it against information from your employer (W-2 forms), banks (1099 forms), and other sources. If the numbers match, the IRS processes your refund or records what you owe. This matching process is automated and happens for millions of returns.
If there is a discrepancy — your return shows different income than your employer reported, for example — the IRS sends you a notice. You then have the chance to explain or correct the error. The IRS also collects taxes throughout the year through payroll withholding: your employer deducts federal income tax from each paycheck and sends it to the IRS on your behalf.
What happens during an IRS audit
An audit is an examination of your tax return to verify that the information is correct and complete. The IRS selects returns for audit based on statistical patterns, random selection, or because something on your return looks unusual — for example, deductions that are much larger than average for your income level.
Most audits are handled by mail. The IRS sends you a letter asking for specific documents: receipts, bank statements, invoices, or other proof that supports what you claimed on your return. You have a important date to respond, usually 30 days. If the IRS finds that you underpaid, you owe the difference plus interest and possibly penalties. If you overpaid, you receive a refund.
A smaller number of audits are conducted in person, either at an IRS office or at your home or business. These are less common and usually involve more complex issues or larger amounts of money. You have the right to bring a representative — a tax professional, accountant, or attorney — to an audit.
How to contact the IRS
The IRS operates a phone line at 1-800-829-1040 for individual taxpayers. Wait times are often very long, especially during tax season (January through April). You can also mail questions or documents to the IRS address listed on your notice or on irs.gov.
The IRS website at irs.gov has a search tool, downloadable forms, and a "Where's My Refund?" tracker that shows the status of your return. You can also create an account on irs.gov to view your tax account and payment history. The IRS does not respond to emails sent to a general inbox, but some local IRS offices have email addresses for specific issues — these are listed on irs.gov by state.
If you need help understanding a notice or responding to an audit, you can hire a tax professional. The IRS also operates the Taxpayer Advocate Service, a free office within the IRS that helps taxpayers who are having trouble resolving a problem. You can reach them at 1-877-777-4778.
IRS scams and how to recognize them
Scammers impersonate the IRS to steal personal information and money. The real IRS does not initiate contact through text message, email, or social media. The IRS contacts you first by mail, not by phone, unless you have already called them or they have sent you a notice.
A common scam is a phone call claiming you owe taxes and threatening arrest or license suspension if you do not pay when ready. Another is an email or text with a link to "verify your information" or "claim your refund." These are always fraudulent. If you receive a suspicious message claiming to be from the IRS, do not click any links or provide personal information. You can report it to the Treasury Inspector General for Tax Administration at tigta.gov.
If you are unsure whether an IRS notice is real, call the IRS directly using the number on your notice or look up the number on irs.gov yourself — do not use a number from the suspicious message.
What to do if you owe back taxes
If you have not filed a return for a past year or you owe taxes from a previous year, the IRS will eventually send you a notice. The longer you wait, the more interest and penalties accumulate. Interest is currently charged daily on unpaid taxes. Penalties vary depending on why you did not pay — failure to file, failure to pay, or accuracy-related penalties.
You have options. You can pay the full amount owed. You can request a payment plan (called an installment agreement) that lets you pay over time — the IRS charges a setup fee and interest continues to accrue. You can also request an offer in compromise, which is a settlement for less than you owe, though the IRS approves these only in specific circumstances. To explore these options, contact the IRS or work with a tax professional.
Your rights if you disagree with the IRS
If the IRS sends you a notice saying you owe more tax and you disagree, you have the right to appeal. The notice itself will explain how to request an appeal and the important date to do so — usually 30 days. You can appeal through the IRS Office of Appeals, which is separate from the office that made the original decision.
During an appeal, you can present new evidence or arguments about why the IRS's position is wrong. If you still disagree after the appeal, you can take the case to Tax Court, a federal court that hears only tax disputes. You do not need a lawyer, though many people hire one. There is a filing fee to start a case in Tax Court.
Frequently Asked Questions
Can the IRS take my bank account or paycheck?
Yes. If you owe taxes and do not respond to notices, the IRS can place a levy on your bank account or garnish your wages. A levy freezes the money in your account; a garnishment directs your employer to send part of your paycheck to the IRS. The IRS must send you a notice before it levies, and you have the right to request a hearing to challenge it.
What is the difference between the IRS and a tax preparer?
The IRS is the government agency that collects taxes and enforces tax law. A tax preparer is a person or company you hire to help you file your return. Tax preparers can be accountants, enrolled agents, or tax software companies. They do not work for the IRS, though they must follow IRS rules.
How long does the IRS have to audit me?
The IRS generally has three years from the date you file your return to audit it. If you underreported income by 25 percent or more, the period extends to six years. In cases of fraud, there is no time limit. The IRS can also go back further if you did not file a return at all.
Do I have to respond to an IRS notice?
Yes. Ignoring an IRS notice does not make it go away. The IRS will continue to assess penalties and interest, and may take enforcement action like levying your account or garnishing your wages. If you receive a notice, respond by the important date or contact the IRS to request more time.
What happens if I file my taxes late?
If you file late, the IRS charges a failure-to-file penalty, which is usually 5 percent of the unpaid tax for each month the return is late. If you also owe tax, you owe interest on it from the original due date. If you are owed a refund, filing late does not result in a penalty, but you may lose the refund if you wait more than three years to file.