IRS Tax filing mistakes in 2026: Are simple errors triggering IRS audits, refund delays, and costly penalties for millions?

Over 160 million IRS tax returns will be filed in 2026, and small tax filing mistakes can delay refunds or trigger an IRS audit. The 2026 tax season demands accuracy. Wrong Social Security numbers cause refund delays. Missing 1099 income raises audit risk. Inflated business deductions get flagged. Late filing slows tax refund processing. Use IRS online tools. E-file early. Report all income. Claim valid tax credits. Avoid common tax mistakes.