7 Common Tax-Filing Mistakes to Dodge This Season

Happy Tax Day 2026! Whether you’re ahead of the curve or racing the midnight clock, today is the final sprint. With the recent Working Families Tax Cuts coming into full effect this year, the math looks a little different for many households.

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To help you cross the finish line without an IRS audit or a rejected return, here are seven common pitfalls to avoid:

1. Choosing the Wrong Filing Status

Don’t just default to “Single” or “Married Filing Jointly” if your life changed in 2025. Your status determines your standard deduction and eligibility for specific credits.

• The Fix: If you had a change in marital status or gained a dependent, double-check your eligibility for Head of Household, which often offers better rates than filing Single.

2. Typographical “Glitches”

The IRS systems are unforgiving when it comes to typos. A transposed digit in a Social Security Number or a misspelled name (especially if it doesn’t match Social Security Administration records) will lead to an immediate rejection.

• The Fix: Triple-check your SSNs and your bank routing/account numbers. A refund sent to the wrong account is a headache you don’t want.

3. Overlooking Side-Hustle Income

If you spent 2025 driving for a ride-share, selling vintage gear, or freelancing, that income must be reported. The IRS receives copies of 1099-K and 1099-NEC forms, and they will notice if yours are missing.

• The Fix: Gather all 1099s before you start. Even if you didn’t receive a physical form, remember that self-employment income over $400 generally needs to be reported.

4. Miscalculating the 2025 Tax Credits

The new Working Families Tax Cuts are a win for many, but because they are relatively new, it’s easy to misapply the rules.

• The Fix: Rely on updated 2026 tax software or a CPA. Manual calculations on new tax laws are where most errors occur.

5. Basic Math Errors

Even with software, manual entries for charitable donations, medical expenses, or business deductions can go sideways if you’re rushing.

• The Fix: Review your itemized deductions one last time. If you’re filing a paper return, have a second set of eyes look over your arithmetic.

6. Missing the Deadline Without an Extension

If the clock hits midnight and you haven’t filed, you could face failure-to-file penalties.

• The Fix: If you aren’t ready, file Form 4868 by tonight. This buys you until October 15, 2026, to finish the paperwork.
• Important: An extension to file is not an extension to pay. If you owe, pay the estimated amount today to avoid interest.

7. The “Ghost” Signature

An unsigned return is legally invalid. For e-filers, this usually happens when you fail to provide your Self-Select PIN or last year’s Adjusted Gross Income (AGI) to verify your identity.

• The Fix: Don’t close your browser until you receive a formal confirmation or “Submission Accepted” receipt.

Quick Tip: For the fastest refund, choose Direct Deposit. The IRS is prioritizing electronic transfers to manage the high volume of claims related to the new tax cuts.