Filing Your Own Taxes: A Step-By-Step Guide

Quick answer

• Gather all your income statements (W-2s, 1099s) and deduction/credit documentation.
• Determine your filing status (Single, Married Filing Jointly, etc.).
• Choose a filing method: tax software, tax professional, or IRS Free File.
• Calculate your Adjusted Gross Income (AGI) by subtracting certain deductions from your gross income.
• Identify eligible tax credits and deductions to reduce your tax liability.
• File your return by the April deadline or file for an extension if needed.

What to check first (before you file or change withholding)

Filing Status

Your filing status is crucial as it impacts your tax brackets, standard deduction amount, and eligibility for certain credits and deductions. The most common statuses are Single, Married Filing Separately, Married Filing Jointly, Head of Household, and Qualifying Widow(er).

• What to check: Review your personal circumstances at the end of the tax year to determine which status accurately reflects your situation. For example, if you are unmarried and support a qualifying child, Head of Household might be an option.
• Good looks like: You’ve confidently identified the single filing status that best suits your situation and are using the corresponding tax tables or software settings.
• Common mistake: Using the wrong filing status. This can lead to overpaying or underpaying taxes. For instance, if you’re married but file as Single, you might miss out on the benefits of Married Filing Jointly.

Income Sources

You need to account for all income received throughout the year, not just from your primary job. This includes wages, salaries, tips, self-employment income, interest, dividends, capital gains, unemployment benefits, and any other taxable income.

• What to check: Collect all income statements, such as W-2s from employers, 1099 forms for freelance work or investment income, and statements for interest and dividends.
• Good looks like: You have a complete list of all income earned, supported by official documentation from each source.
• Common mistake: Forgetting to report all income. This can result in penalties and interest from the IRS. For example, forgetting to report income from a side gig reported on a 1099-NEC can lead to issues.

Withholding or Estimated Payments

For those who are employees, taxes are typically withheld from each paycheck based on the information you provide on Form W-4. If you are self-employed or have significant income not subject to withholding, you may need to make estimated tax payments throughout the year.

• What to check: Review your pay stubs to ensure your W-4 elections are still accurate for your current situation. If you anticipate owing a significant amount or receiving a large refund, your withholding might need adjustment. For those making estimated payments, ensure they were made on time and in the correct amounts.
• Good looks like: Your withholding is set up so that you owe a small amount or receive a small refund, indicating your tax liability is being met accurately throughout the year. Estimated payments are on track.
• Common mistake: Incorrect W-4 allowances or failing to make estimated tax payments. This can lead to a large tax bill at the end of the year or penalties for underpayment.

Deductions and Credits

Deductions reduce your taxable income, while credits directly reduce the amount of tax you owe. Understanding which ones you qualify for can significantly lower your tax burden. Common deductions include student loan interest, IRA contributions, and itemized deductions like medical expenses or state and local taxes (subject to limits). Common credits include the Child Tax Credit, Earned Income Tax Credit, and education credits.

• What to check: Gather all receipts and documentation for potential deductions and credits. Familiarize yourself with the eligibility requirements for common tax breaks.
• Good looks like: You’ve identified all the deductions and credits you’re eligible for and have the necessary documentation to support them.
• Common mistake: Missing out on eligible deductions and credits. Many taxpayers leave money on the table by not taking advantage of these tax-saving opportunities.

Deadlines and Extensions

The primary tax filing deadline in the U.S. is typically April 15th. If this date falls on a weekend or holiday, it shifts to the next business day. If you cannot file by the deadline, you can request an extension, which grants you more time to file, but not more time to pay.

• What to check: Note the upcoming tax deadline and be aware of the process for requesting an extension if needed.
• Good looks like: You are aware of the filing deadline and plan to file on time or have already filed for an extension.
• Common mistake: Missing the filing deadline without filing an extension. This can lead to penalties for failure to file.

Step-by-step (simple workflow)

1. Gather Your Documents:

• What to do: Collect all W-2s, 1099s (for freelance income, interest, dividends, etc.), Social Security statements, and any other income-related documents. Also, gather documentation for any potential deductions or credits (e.g., student loan interest statements, medical expense receipts, charitable donation acknowledgments).
• What “good” looks like: You have all necessary income forms and supporting documents for deductions and credits organized and ready.
• Common mistake and how to avoid it: Not having all documents before starting. Avoid this by setting aside time to gather everything before you begin the filing process.

2. Choose Your Filing Method:

• What to do: Decide whether you will use tax preparation software (online or desktop), hire a tax professional, or utilize IRS Free File if you qualify.
• What “good” looks like: You’ve selected a method that suits your comfort level with taxes, complexity of your return, and budget.
• Common mistake and how to avoid it: Overestimating your ability to file complex returns accurately using basic software. Avoid this by choosing a more robust software or a professional if your tax situation is complicated.

3. Determine Your Filing Status:

• What to do: Review the IRS definitions for Single, Married Filing Separately, Married Filing Jointly, Head of Household, and Qualifying Widow(er) and select the one that best applies to you.
• What “good” looks like: You’ve accurately identified your filing status based on your marital and dependency situation.
• Common mistake and how to avoid it: Choosing the wrong status. This can happen if you’re unsure about the criteria for Head of Household. Always consult the IRS guidelines or software prompts.

4. Calculate Your Gross Income:

• What to do: Add up all income from all sources reported on your W-2s and 1099s, as well as any other taxable income not reported on these forms.
• What “good” looks like: Your total gross income accurately reflects all money earned during the tax year.
• Common mistake and how to avoid it: Forgetting to include all income. Double-check all your income documents and make sure nothing is missed.

5. Calculate Your Adjusted Gross Income (AGI):

• What to do: Subtract “above-the-line” deductions from your gross income. These include contributions to a traditional IRA, student loan interest, and self-employment tax deductions.
• What “good” looks like: Your AGI is calculated correctly, providing the basis for many other tax calculations.
• Common mistake and how to avoid it: Not knowing which deductions are “above-the-line.” Use your chosen software or consult IRS Publication 17 for a list.

6. Determine Your Deductions (Standard vs. Itemized):

• What to do: Compare the standard deduction amount for your filing status with the total of your potential itemized deductions (e.g., medical expenses, state and local taxes, mortgage interest, charitable contributions). Choose whichever is greater.
• What “good” looks like: You’ve selected the deduction method that will lower your taxable income the most.
• Common mistake and how to avoid it: Not itemizing when it would be more beneficial. If your itemized deductions exceed the standard deduction, you should itemize.

7. Calculate Taxable Income:

• What to do: Subtract your chosen deduction (standard or itemized) from your AGI.
• What “good” looks like: You have accurately calculated your taxable income, which is the amount of income subject to tax.
• Common mistake and how to avoid it: Incorrectly subtracting deductions. Ensure you are using the correct figures for your AGI and deductions.

8. Calculate Your Tax Liability:

• What to do: Use the tax tables or tax rate schedules provided by the IRS (or built into your tax software) based on your taxable income and filing status to determine your initial tax amount.
• What “good” looks like: Your tax liability is accurately calculated according to the current year’s tax rates.
• Common mistake and how to avoid it: Using outdated tax tables or incorrect rates. Always use the most current IRS tax forms and publications.

9. Apply Tax Credits:

• What to do: Identify and claim all eligible tax credits. Credits directly reduce your tax bill, dollar for dollar, making them very valuable. Examples include the Child Tax Credit, Earned Income Tax Credit, and education credits.
• What “good” looks like: You’ve claimed every credit you qualify for, significantly reducing your final tax owed.
• Common mistake and how to avoid it: Missing out on valuable credits. Research credits you might be eligible for, especially if you have children or are pursuing education.

10. Calculate Your Final Tax Due or Refund:

• What to do: Subtract the total of your tax credits from your calculated tax liability. Then, subtract the amount of taxes already paid through withholding or estimated payments. If the result is positive, that’s what you owe. If it’s negative, that’s your refund.
• What “good” looks like: You have a clear understanding of whether you owe money or are due a refund.
• Common mistake and how to avoid it: Errors in calculating payments made. Ensure all withholding and estimated payments are accounted for correctly.

11. Review and Sign Your Return:

• What to do: Carefully review your entire tax return for accuracy. Check all numbers, names, and Social Security numbers. Sign and date the return.
• What “good” looks like: Your return is error-free and properly signed, ready for submission.
• Common mistake and how to avoid it: Typos or missed entries. A thorough review can catch these errors before they cause problems.

12. File Your Return:

• What to do: Submit your completed tax return electronically (e-file) or by mail by the tax deadline. If you owe taxes, make sure your payment is submitted on time.
• What “good” looks like: Your return is successfully filed and, if applicable, your payment is made by the deadline.
• Common mistake and how to avoid it: Filing late without an extension. This incurs penalties. File on time or get an extension.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
<strong>Incorrect Filing Status</strong>	Overpaying or underpaying taxes; ineligible for certain deductions or credits.	Amend your return by filing Form 1040-X.
<strong>Forgetting to Report Income</strong>	Underpayment penalties and interest; potential audit.	Amend your return to report the missing income and pay any additional tax due.
<strong>Missing Deductions/Credits</strong>	Paying more tax than necessary.	Amend your return to claim missed deductions and credits.
<strong>Math Errors</strong>	Incorrect tax owed or refund amount; potential for IRS notices.	If caught by the IRS, they will send a notice with the correct amount. You can also amend your return to correct it yourself.
<strong>Incorrect Social Security Numbers</strong>	Delays in processing your return, denial of dependents or credits.	Amend your return with the correct Social Security numbers.
<strong>Late Filing Without Extension</strong>	Failure-to-file penalty, which can be substantial.	File as soon as possible and pay any tax owed. The penalty is often less than the interest.
<strong>Late Payment Without Extension</strong>	Failure-to-pay penalty and interest on the unpaid amount.	Pay as much as you can immediately and pay the remaining balance as soon as possible. Consider a payment plan if needed.
<strong>Not Keeping Records</strong>	Inability to support your deductions or credits if audited; difficulty amending past returns.	Reconstruct records as best as possible; keep all tax-related documents for at least three years after filing.
<strong>Incorrect Bank Account for Refund</strong>	Delayed refund or check sent to the wrong account.	Contact the IRS if the refund hasn’t arrived within the expected timeframe. If direct deposit failed, a paper check may be issued.
<strong>Not Signing and Dating the Return</strong>	The IRS will consider the return incomplete and will not process it.	Sign and date the return and resubmit it. This will likely delay processing and may incur late filing penalties if past the deadline.

Decision rules (simple if/then)

• If you are single and have no dependents, then your filing status is likely Single because this is the default for unmarried individuals.
• If you are married and both you and your spouse agree, then you can file as Married Filing Jointly because this often results in a lower tax liability than filing separately.
• If you have significant medical expenses that exceed a certain percentage of your AGI, then you should consider itemizing deductions because these expenses may be deductible.
• If you have children and meet specific income requirements, then you may be eligible for the Child Tax Credit because this credit directly reduces your tax liability.
• If you are self-employed and expect to owe at least \$1,000 in taxes, then you must make estimated tax payments quarterly because failure to do so can result in penalties.
• If you can’t file by the April deadline, then you should file for an extension because this gives you more time to submit your return, avoiding the failure-to-file penalty.
• If your tax software or tax professional identifies more tax savings by itemizing, then you should itemize deductions because this will lower your taxable income more than the standard deduction.
• If you received income from freelance work or as an independent contractor, then you likely received a Form 1099-NEC or 1099-MISC because this form reports non-employee compensation.
• If you have a large tax refund coming, then you might consider adjusting your W-4 withholding to have more money in your paycheck throughout the year because a large refund means you overpaid your taxes.
• If you owe taxes and cannot pay the full amount by the deadline, then you should explore payment options like an IRS payment plan because this can help you avoid larger penalties and interest over time.
• If you paid for education expenses for yourself or a dependent, then you may qualify for education credits like the American Opportunity Tax Credit or Lifetime Learning Credit because these can significantly reduce your tax bill.
• If you are unsure about a specific tax rule or deduction, then consult the IRS website or a qualified tax professional because accurate information is crucial for a correct tax return.

FAQ

Q: What is the difference between a tax deduction and a tax credit?

A: A tax deduction reduces your taxable income, meaning you pay tax on a smaller amount of money. A tax credit, on the other hand, directly reduces the amount of tax you owe, dollar for dollar. Credits are generally more valuable than deductions.

Q: How do I know if I should itemize deductions or take the standard deduction?

A: You should itemize if the total of your eligible itemized deductions (like mortgage interest, state and local taxes up to a limit, medical expenses above a threshold, and charitable donations) is greater than the standard deduction amount for your filing status. Tax software can help you compare these.

Q: What is IRS Free File?

A: IRS Free File is a program that allows taxpayers who meet certain income requirements to file their federal income taxes for free using guided tax software. It’s a great option for those with simpler tax situations.

Q: What happens if I file my taxes late?

A: If you file late without filing an extension, you may be subject to a failure-to-file penalty, which is typically a percentage of the unpaid taxes for each month or part of a month that a tax return is late.

Q: How long should I keep my tax records?

A: The IRS generally recommends keeping tax records for at least three years from the date you filed your return or the due date of the return, whichever is later. Some records, like those for property sales, should be kept longer.

Q: Can I amend my tax return if I made a mistake?

A: Yes, you can amend your tax return by filing Form 1040-X, Amended U.S. Individual Income Tax Return. You should do this as soon as you discover an error that affects your tax liability.

Q: What is Adjusted Gross Income (AGI)?

A: AGI is your gross income minus certain specific deductions, often called “above-the-line” deductions. It’s an important figure used to determine your eligibility for various tax credits and deductions.

Q: Do I need to report all my income, even small amounts?

A: Yes, you are required to report all taxable income, regardless of how small the amount is. This includes income from side jobs, interest, dividends, and any other sources.

What this page does NOT cover (and where to go next)

• State and Local Taxes: This guide focuses on federal income taxes. You will likely need to file separate state and, in some cases, local tax returns, which have their own rules and forms.
• Specific Investment Tax Rules: Detailed strategies for capital gains/losses, cryptocurrency, or complex investment vehicles are not covered here.
• Business Tax Returns: This guide is for individual filers. Businesses have entirely different tax forms and regulations.
• International Tax Issues: If you have income earned or assets held outside the U.S., you will need specialized advice.
• Estate and Gift Taxes: These are separate tax types with their own complex rules and thresholds.