I’m a Tax Preparer: The Refund Error That Triggers IRS Letters Most Often

Why It Matters

IRS letters can delay refunds, spark audits, and increase compliance costs for millions of low‑ and moderate‑income filers.

Key Takeaways

• EITC errors cause about 25% of improper credit payments
• Duplicate child claims or SSN mismatches trigger IRS notices
• Filing before receiving all W‑2/1099 forms leads to recalculation letters
• Consistent business losses may be reclassified as a hobby
• Verify eligibility and wait for complete documents to prevent letters

Pulse Analysis

The Earned Income Tax Credit remains one of the most heavily scrutinized deductions because it directly puts cash in taxpayers’ hands. In 2018 the IRS estimated that roughly a quarter of EITC claims were improper, often due to a child who does not meet the relationship, age, residency, or filing‑status requirements. Taxpayers and preparers alike must double‑check Social Security numbers and ensure that each claimed dependent satisfies every eligibility rule, reducing the likelihood of a corrective IRS notice.

Unreported income is another common catalyst for IRS correspondence. The agency receives every W‑2 and 1099 a taxpayer is issued and automatically matches those forms to the filed return. When a return is submitted before all income documents are in hand, mismatches trigger recalculation letters that can delay refunds and invite further review. The safest approach is to wait until the final paycheck, freelance 1099, or other income statements are received before filing, thereby aligning the return with the IRS’s data set.

Repeated business losses also draw IRS attention, especially when a venture shows little to no profit over multiple years. The agency may reclassify such activity as a hobby, disallowing deductions and potentially levying penalties. To demonstrate a legitimate business, taxpayers should maintain thorough records, show a clear profit‑seeking intent, and consider the “hobby loss” rules. By adhering to these best practices—verifying EITC eligibility, waiting for complete income documentation, and substantiating business profitability—filers can avoid costly IRS letters and keep their tax compliance on solid footing.