The IRS: Role, Functions, and How It Affects Taxpayers

Introduction

The Internal Revenue Service (IRS) is the federal bureau charged with enforcing and administering tax laws across the United States. As part of the Department of the Treasury, it collects taxes, processes returns, issues refunds, and works to ensure taxpayers meet their obligations. Knowing how the IRS operates helps individuals and businesses navigate the U.S. tax system with confidence.

History of the IRS

The IRS traces its origins to the Civil War era. In 1862, President Abraham Lincoln and Congress created the Office of the Commissioner of Internal Revenue to fund the war through income taxes. Although that income tax was repealed about a decade later, the need for a steady revenue source led to the ratification of the 16th Amendment in 1913. This amendment gave Congress the power to impose an income tax without apportioning it among the states, laying the groundwork for the modern IRS.

The agency has changed significantly over time. Electronic filing (e-filing), introduced in 1986, transformed how tax returns are submitted. By the early 2000s, millions of Americans were filing electronically, reducing errors and speeding up processing. Another milestone was the 1998 IRS Restructuring and Reform Act, which aimed to improve customer service and strengthen taxpayer rights.

Primary Functions of the IRS

The IRS’s core work includes tax collection and enforcement, processing returns and refunds, offering taxpayer assistance, and administering credits and benefits.

Tax Collection and Enforcement

Collecting taxes from individuals and businesses is one of the IRS’s central duties. The agency levies several types of federal taxes: income, corporate, employment, and excise. When obligations go unmet, it can deploy various enforcement tools—from notices and penalties to wage levies or asset seizures. For example, someone owing $15,000 in unpaid taxes may face wage garnishment or a lien on property to satisfy the debt.

Tax Return Processing and Refunds

Each year the IRS processes more than 150 million individual tax returns. During tax season, millions of taxpayers file by the April deadline, with many expecting refunds. The agency uses sophisticated systems to verify information, calculate refunds, and detect discrepancies. EITC returns, for example, may be held until mid-February to prevent fraud. In 2023, the average refund was around $3,000, underscoring the importance of accurate filing.

Taxpayer Assistance and Resources

The IRS provides a range of services to help taxpayers understand and meet their obligations. Options include online tools, phone support, and walk-in help at local Taxpayer Assistance Centers (TACs). The “Where’s My Refund?” tool and IRS Free File program offer convenient ways to manage tax matters. A taxpayer unsure about filing status can use the Interactive Tax Assistant (ITA) for personalized guidance.

Tax Credits and Benefits

Beyond collecting taxes, the IRS administers several credits and benefits: the Child Tax Credit (CTC), EITC, and American Opportunity Tax Credit (AOTC). During the COVID-19 pandemic, the agency also distributed Economic Impact Payments (stimulus checks) and managed advanced Child Tax Credit payments, highlighting its role in delivering financial relief during difficult times.

Structure of the IRS

Understanding the IRS’s structure helps clarify how the agency operates as a whole.

Leadership and Divisions

The IRS is led by a Commissioner appointed by the President and confirmed by the Senate. The Commissioner oversees operations, enforces tax laws, and ensures effective service delivery. Under the Commissioner, the IRS is divided into several major divisions that serve different taxpayer segments.

Key Departments and Their Roles

How the IRS Affects Taxpayers

Most people interact with the IRS during tax season when filing returns or receiving refunds. Businesses engage more frequently, especially with payroll taxes, quarterly estimated payments, and compliance checks. A small business owner, for instance, must remit employment taxes on behalf of employees and may face penalties for missed deadlines.

Common IRS Communications

The IRS communicates mainly by mail, sending letters and notices about tax matters. Notices may inform taxpayers of balances due, return adjustments, or audit notifications. If someone receives a CP2000 notice—which indicates discrepancies between reported income and third-party data—responding promptly with supporting documents can often resolve the issue without further action.

Compliance and Recordkeeping

Compliance with tax laws is essential to avoid penalties, interest, and legal action. Keeping accurate records of income, expenses, and deductions simplifies filing and supports claims if audited. For instance, retaining receipts for charitable donations ensures you can substantiate deductions if the IRS questions them.

IRS Tools and Resources

The IRS has expanded digital services and educational materials to make it easier for taxpayers to manage their obligations.

IRS Online Account Services

With an IRS Online Account, individuals can view tax balances, make payments, and access past tax records. Someone who needs a transcript to apply for a mortgage can download it instantly, saving time compared to traditional mail requests.

Taxpayer Advocate Service (TAS)

The TAS is an independent organization within the IRS that helps taxpayers facing unresolved issues or financial hardship. If you experience delays or difficulty navigating the system, the TAS can intervene and work toward resolution. In one case, a taxpayer waiting months for a refund received assistance through the TAS, resulting in expedited processing.

Educational Resources and Publications

The IRS website offers a wealth of information through publications, tax guides, and instructional videos. Topics range from basic filing instructions to complex scenarios. Publication 17 provides a comprehensive overview of individual tax filing requirements, while Publication 463 covers travel, gift, and car expenses for businesses.

Current Challenges

In recent years, the IRS has faced significant budget constraints, leading to staff reductions and diminished capacity to handle the growing complexity of the U.S. tax system. Lawmakers have raised concerns about how these cuts could affect taxpayers—including delays in processing refunds, longer wait times on the IRS helpline, and generally degraded taxpayer services. As the agency struggles with these challenges, it faces difficulties in processing returns, conducting audits, and assisting taxpayers with compliance and refund issues.

For taxpayers, these issues can lead to frustration, especially for those who rely on timely refunds or need help navigating tax complexities. Delays in refunds can negatively impact individuals and businesses that depend on those funds, while long wait times or poor service may leave many unable to resolve issues efficiently.