Avoid These Common Tax Season Mistakes

Tax season can be stressful, but avoiding simple mistakes can make the process smoother and help you get the refund you deserve. Even the tiniest error could mean delays, penalties or missed opportunities to save money. At Louisiana USA, we want to help you navigate tax season with confidence. Here are the most common tax mistakes—and how to avoid them. 

1. Missing the Filing Deadline 

The IRS tax deadline is typically April 15, and missing it can result in penalties and interest. If you need more time, filing for an extension can give you until October—but remember, an extension only applies to filing, not paying what you owe. 

Tip: Set calendar reminders and gather your tax documents early to avoid last-minute stress. 

2. Incorrect or Missing Social Security Numbers 

A simple typo in your Social Security number (SSN) can cause your return to be rejected or delay your refund. This mistake is more common than you’d think, especially when filing for dependents. 

Tip: Double-check all SSNs before submitting your return to prevent processing issues. 

3. Math Errors & Incorrect Income Reporting 

Even a small math mistake can lead to tax miscalculations, which may result in overpaying or underpaying. Additionally, forgetting to report all sources of income—including freelance work, side gigs or investment earnings—can raise red flags with the IRS. 

Tip: Use tax software or a professional preparer to ensure accuracy. If you’re doing your taxes manually, triple-check all calculations. 

4. Choosing the Wrong Filing Status 

Your filing status—Single, Married Filing Jointly, Married Filing Separately, Head of Household or Qualifying Widow(er)—affects your tax rate and potential deductions. Selecting the wrong status could mean paying more than necessary or missing out on valuable tax breaks. 

Tip: If you’re unsure about the best filing status, consult a tax professional or use the IRS online tool for guidance. 

5. Overlooking Deductions & Tax Credits 

Every year, taxpayers miss out on deductions and credits that could lower their tax bill. Some of the most commonly overlooked include: 

• Earned Income Tax Credit (EITC): Available to low-to-moderate-income taxpayers. 
• Child Tax Credit: Helps parents offset the costs of raising children. 
• Student Loan Interest Deduction: Reduces taxable income for those paying off student loans. 
• Home Office Deduction: Applies to self-employed individuals who use part of their home for business. 
• Medical Expense Deduction: If medical costs exceed 7.5% of your adjusted gross income, you may qualify for a deduction. 

Tip: Keep detailed records and receipts for deductible expenses throughout the year. 

6. Not Keeping Proper Documentation 

Taxpayers are required to keep records of their tax returns, W-2s, 1099s and receipts for deductions for at least three years in case of an audit. Losing these documents can make it difficult to file future returns or dispute discrepancies. 

Tip: Store your documents in a secure, organized location—digitally and physically. 

7. Filing Too Early or Too Late 

Filing too early—before you receive all necessary tax forms—can lead to mistakes and amended returns. On the other hand, waiting until the last minute increases the risk of errors and penalties if you miss the deadline. 

Tip: Aim to file between February and early April once you’ve received all W-2s, 1099s and other required tax documents. 

8. Errors in Direct Deposit Information 

Direct deposit is the fastest way to get your refund, but entering the wrong bank account number can delay your money—or send it to the wrong account. 

Tip: When entering your banking details, check and double-check your routing and account numbers to ensure accuracy. 

9. Ignoring State Taxes 

Federal taxes aren’t the only concern—Louisiana residents also need to file a state tax return. Failing to do so can result in fines or delayed refunds. 

Tip: Check the Louisiana Department of Revenue website for filing requirements and deadlines. 

10. Not Contributing to Retirement Accounts Before the Deadline 

Did you know you can lower your taxable income by contributing to an IRA or Health Savings Account (HSA) before the tax filing deadline? You can apply contributions made by the tax deadline (usually April 15) to the previous tax year. 

Tip: If you’re looking for ways to reduce your tax burden, consider making an IRA or HSA contribution before filing your taxes. 

11. Failing to Pay Estimated Taxes 

If you’re self-employed or have additional income that isn’t taxed at the source (such as rental income, investments or freelance work), you may need to pay estimated taxes quarterly. Missing these payments could lead to penalties. 

Tip: Use the IRS tax calculator to estimate what you owe and set up automatic payments to stay on track. 

12. Not Filing Because of Low Income 

Even if you don’t owe taxes, filing a return can still be beneficial. Refundable credits like the Earned Income Tax Credit (EITC) or Child Tax Credit can provide a refund even if you had little or no taxable income. 

Tip: File your taxes to see if you qualify for a refund—you might be leaving money on the table! 

13. Failing to Review the Return Before Submitting 

Once you submit your tax return, it’s difficult to fix mistakes without filing an amended return. Small errors—like a misspelled name or missing deduction—can cause processing delays. 

Tip: Before filing, review all information carefully or have a trusted friend or professional look it over as they might catch something that you’ve missed. 

14. Forgetting to Sign and Date the Return

If you’re filing a paper return, forgetting to sign it is one of the most common mistakes. The IRS will reject unsigned tax forms, delaying your filing process. 

Tip: If filing electronically, use an e-signature to complete the process. If filing by mail, double-check that you’ve signed and dated the return. 

15. Ignoring IRS Correspondence 

If you receive a letter from the IRS, don’t ignore it! Many issues can resolve quickly, but delaying action may lead to penalties or further complications. 

Tip: If you’re unsure how to respond to an IRS notice, seek assistance from a tax professional. 

Tax season doesn’t have to be overwhelming. By avoiding these common mistakes, you can file with confidence and maximize your refund. At Louisiana USA, we’re here to support you every step of the way—whether you need financial guidance, savings solutions or help planning for the future. 

Need help managing your finances this tax season? Contact Louisiana USA today and let us help you make the most of your money.