Avoid IRS penalties in 2025 by understanding common tax mistakes and taking proactive measures. This guide covers four major reasons taxpayers face fines—late filing, underpayment, inaccurate reporting, and early withdrawals—and provides actionable steps to avoid them. Whether you’re self-employed, a business owner, or a regular taxpayer, these expert tips will help you stay compliant and save money. Read on for essential insights and links to official IRS resources.