Common Tax Filing Mistakes and How to Avoid Them

Most tax filing mistakes are preventable. They rarely come from complicated tax law — they come from rushing, missing documents, or small errors that compound. Here are the most common mistakes we see and how to avoid them.

1. Missing or incorrect Social Security numbers

A transposed digit in a Social Security number or ITIN is one of the most common reasons a return is rejected or delayed. Double-check every number against the actual card — for you, your spouse, and every dependent.

2. Forgetting a W-2 or 1099

It's easy to overlook a form from a job you left mid-year or a small 1099 from a side gig. The IRS receives copies of these forms too, so missing income creates a mismatch that can trigger a notice. Gather every income document, and remember that income earned below the 1099 threshold still counts.

3. Choosing the wrong filing status

Filing status (single, married filing jointly, married filing separately, head of household, qualifying surviving spouse) affects your standard deduction, tax brackets, and eligibility for credits. Head of household, for example, can be more favorable than single if you qualify. We help you confirm the status that fits your situation.

4. Missing deductions or credits you're eligible for

The flip side of over-claiming is under-claiming. Education credits, child-related credits, retirement contributions, and certain deductions are easy to overlook. Bring all relevant documents and let us apply what fits — we never promise a credit or deduction, but we make sure eligible ones aren't missed.

5. Bad bank information for direct deposit

A wrong routing or account number can delay a refund or send it to the wrong place. Verify the numbers directly from a check or your bank's app — don't type from memory.

6. Filing before all documents arrive

Filing early is good; filing incomplete is not. If a corrected W-2 or late 1099 arrives after you file, you may need to amend. Wait until you're confident you have everything, or let us track what's still outstanding.

7. Math and data-entry errors

Even with software, manual entry errors happen — wrong totals, duplicated figures, or numbers in the wrong box. A careful review before filing catches these. That's why every return we prepare is reviewed with you before anything is filed.

8. Ignoring estimated taxes when self-employed

Self-employed taxpayers who don't make quarterly estimated payments can face a large bill — and possible underpayment penalties — at filing time. If your income isn't subject to withholding, ask us about estimated payments. See our self-employed filing guide.

9. Not keeping records after filing

Keep copies of your return and supporting documents for at least three years (longer in some cases). If the IRS has questions, you'll want the records handy.

How we help you avoid all of these

Our process is built around catching these mistakes: we follow up about missing documents, confirm your filing status, review every figure with you, and file only after you approve. Start your filing or book an appointment to begin.

This article is general educational information, not tax advice.