Your complete guide to IRS Form 1040 & tax returns

• What is Form 1040? The Form 1040 is the primary document U.S. taxpayers use to file their annual income tax return with the Internal Revenue Service (IRS).
• Who files it? Nearly every individual who earns income in the U.S. must file a tax return using a version of the 1040 tax form, though specific income thresholds apply.
• Key components: The form requires you to report your income, claim deductions and credits, and calculate your total tax liability or refund.
• Schedules are crucial: You may need to attach extra forms, called schedules, to report specific types of income or claim certain deductions, such as business income on Schedule C or itemized deductions on Schedule A.

What is IRS Form 1040?

IRS Form 1040, U.S. Individual Income Tax Return, is the document every U.S. citizen or resident alien uses to report their annual income to the Internal Revenue Service (IRS). It serves as the primary mechanism for calculating an individual’s federal income tax obligation for the tax year.

This essential tax form consolidates all your financial activities to determine your total tax due or the size of your tax refund. It is the foundation for all personal tax reporting.

Who must file a Form 1040?

Filing Form 1040 depends on your gross income, filing status, age, and whether you’re a dependent. Most U.S. citizens or residents with income above a certain threshold must file a tax return. You generally need to file if your gross income equals or exceeds the standard deduction for your filing status, plus any additional deduction for being 65 or older or blind.

There are other specific situations that require filing, even if your income is below the threshold. These include:

• Having net earnings from self-employment tax of $400 or more.
• Owing special taxes, such as Medicare tax or additional taxes on qualified retirement plans.
• Having received any advance payments of the Premium Tax Credit.
• If you are a dependent and meet certain income tests (e.g., unearned income over $1,300).

In practice, most U.S. citizens and residents with taxable income report income on Form 1040; seniors may choose Form 1040-SR. If you’re unsure whether to report income, refer to the official 1040 instructions or consult a tax professional for guidance.

Is Form 1040 the same as a W-2?

No, these forms have significant differences, and mixing them up can cause considerable confusion.

• Form W-2, Wage and Tax Statement, is an informational tax form provided to you by your employer. It details your wages, salaries, tips, and other compensation, along with the amount of federal income tax, state, and local taxes withheld from your pay during the year. You receive a W-2 from each employer you worked for.
• Form 1040 is the actual individual income tax return you file with the IRS. You use the information from your W-2s (as well as 1099s and other tax documents) to complete your Form 1040, ultimately calculating your total tax liability.

How do I get my 1040 tax form?

To report on your taxes correctly, you need to use the right tax form blanks and their versions. There are several ways to obtain the correct 1040 form.

• Download Form 1040 or its corresponding version as fillable PDFs from the IRS website.
• Find the IRS Form 1040 template in pdfFiller Form Library and upload it to the editor for fill-out in a click.
• You can call the IRS at 1-800-TAX-FORM (1-800-829-3676) or order them online and get them delivered by U.S. mail.
• Pick up a blank paper form at a post office or a local library.

Filling out tax forms online is faster and more convenient than using paper. With an online editor, like pdfFiller, you can easily enter your information, save your work, and make the changes whenever needed before submitting.

How to fill out Form 1040 step by step

This tax return guide walks you through the main form sections. With pdfFiller, you can easily prepare your tax return electronically, saving time and eliminating the risks of errors in manual form-filling. 

Step 1: Personal information and filing status

At the top, provide your full name, Social Security number (SSN), and address. If you’re filing jointly, do the same for your spouse.

Choose your filing status: Single, Married filing jointly, Married filing separately, Head of household, or Qualifying surviving spouse. If you have any qualifying children or other dependents, list their full names.

Step 2: Digital assets

Answer whether you received, sold, exchanged, or otherwise disposed of a digital asset or a financial interest in a digital asset. This can include cryptocurrency, certain NFTs, or other digital tokens.

Step 3: Standard deduction checkboxes and dependents

Check any boxes that apply to you or your spouse:

• Someone can claim you (or your spouse) as a dependent
• You are age 65 or older
• You are blind.

Enter your dependents’ names, SSN, their relationship to you, and check whether they qualify for the Child Tax Credit (CTC) or the credit for other dependents.

A snapshot of the IRS Form 1040 uploaded to the pdfFiller’s intuitive editor that simplifies your individual tax return preparation.

Step 4: Income (Lines 1–11)

This section is where you report all the income you received.

• Line 1: Enter your total wages, salaries, and tips from your Form W-2.
• Lines 2-7: Report other types of income, such as taxable interest, qualified dividends, IRA distributions, pensions, and Social Security benefits.
• Line 8: This is for income from other sources, which you’ll detail on Schedule 1. This includes business income, rental real estate income, unemployment compensation, and gambling winnings.
• Line 9: Add up all your income sources to calculate your Total Income.
• Line 10: Report any adjustments to income from Schedule 1. These are “above-the-line” deductions like student loan interest deduction, educator expenses, or contributions to a health savings account.
• Line 11: Subtract Line 10 from Line 9 to find your Adjusted Gross Income (AGI). Your AGI is a key figure used to determine your eligibility for many deductions and credits.

Step 5: Deductions (Lines 12–13)

Here, you reduce your taxable income by taking either the standard deduction or itemized deductions.

• Line 12: You can take the standard deduction—a fixed amount based on your filing status, age, and blindness—or itemize if your eligible expenses (e.g., mortgage interest, taxes, charitable contributions) exceed the standard deduction. To itemize, complete Schedule A.

Line 13: If you have qualified business income, you may be able to take the qualified business income (QBI) deduction. You make these calculations on Form 8995 or 8995-A.

An illustration of how to complete the Income section in pdfFiller.

Step 6: Tax and credits (Lines 14–24)

In this part, you calculate the tax you owe and apply any credits you qualify for.

• Line 14: Add lines 12 and 13 to get total deductions.
• Line 15: Subtract line 14 from line 11. If the result is negative, enter 0. This is your taxable income, the base amount used to compute your federal income tax before credits.
• Line 16: Use the IRS tax tables and any special worksheets referenced in the 1040 instructions to compute your income tax on line 16.
• Line 17: This line pulls additional taxes from Schedule 2, line 3, which may include an Alternative Minimum Tax (AMT), excess advance premium tax credit repayment, or other specified additional taxes.
• Lines 18: Add lines 16 and 17 to get your preliminary total before nonrefundable credits.
• Line 19: Provide Child tax credit and credit for other dependents. Use Schedule 8812 to figure the nonrefundable Child Tax Credit and any credit for other dependents.
• Line 20: Enter other nonrefundable credits from Schedule 3, line 8.
• Line 21: Add lines 19 and 20 to get your total nonrefundable credits.
• Line 22: Subtract line 21 from line 18 to get your tax after nonrefundable credits. If the result is less than zero, enter 0.
• Line 23: Enter other taxes, including self-employment tax, from Schedule 2, line 21.
• Line 24: Add lines 22 and 23 to get your total tax amount.

Step 7: Payments (Lines 25–33)

This section totals all the tax payments you’ve already made throughout the year.

• Line 25: Enter your Federal income tax withheld. Enter withholding from Form W-2 into line 25a and your withholding from Form 1099 into line 25b. Provide other withholding shown on separate forms in line 25c and enter the total of lines 25a–25c into line 25d.
• Line 26: Include any estimated tax payments you made.
• Lines 27-30: Report refundable credits, like the Earned Income Tax Credit (EITC), Additional Child Tax Credit (calculated on Schedule 8812), and American Opportunity Tax Credit (calculated on Form 8863).
• Line 31: Enter other refundable credits from Schedule 3, line 15, such as the Net Premium Tax Credit and Certain Fuel Credits.
• Line 32: Add lines 27, 28, 29, and 31 to get your total other payments and refundable credits.
• Line 33: Add lines 25d, 26, and 32 to get your total payments.

Step 8: Refund or amount you owe (lines 34–38)

This is the final calculation.

• Line 34: Overpayment. If your total payments (Line 33) are more than your total tax (Line 24), you’ve overpaid and are due a tax refund.
• Lines 35a–35d: Refund and direct deposit. Enter the amount from line 34 you want refunded to you into line 35a. You can choose to receive your refund by direct deposit or as a paper check. For direct deposit, enter your routing number (line 35b), account number (line 35d), and indicate the account type (line 35c).
• Line 36: Apply to next year’s estimated tax.
• Lines 37-38: This is the amount you owe. If your total tax (Line 23) is more than your total payments (Line 33), you owe the difference.

Step 9: Sign and date

Finally, sign and date your return. If filing jointly, your spouse must also sign. Any paid preparer you used must sign as well. The IRS considers an unsigned tax return invalid.

Watch our quick video tutorial on how to prepare your Form 1040 individual tax return online using pdfFiller.

What schedules do I need for my Form 1040?

The main 1040 form is relatively short, but many taxpayers need to attach additional forms, known as schedules, to report certain types of income, deductions, or taxes. These forms provide the detailed calculations that feed into the main form.

pdfFiller helps simplify your tax season by providing access to all these forms (and many others) in its library, allowing you to fill out and store them in one secure location. 

When is the 1040 deadline, and how should I file?

Timing and method are two of the most important aspects of tax filing. Meeting the 1040 deadline and choosing the right filing method can save you from penalties and ensure your return is processed quickly.

Tax deadlines

The primary 1040 deadline for most taxpayers is April 15 of the year following the tax year.  If April 15 falls on a weekend or a holiday, the deadline is moved to the next business day. 

If you need more time to file, you can request an automatic six-month extension by filing Form 4868. This gives you time until October 15 to submit your individual tax return. However, the extension gives you more time to file, not more time to pay. You must still estimate and pay any taxes you owe by the original April 15 deadline to avoid penalties and interest.

How to file Form 1040

You have two options to submit your tax return: electronic filing or paper filing. Both methods have advantages, and the choice ultimately depends on your personal preference.

Electronic filing (e-filing)

This is the method recommended by the IRS and used by the vast majority of taxpayers. E-filing is faster, more secure, and generally results in fewer errors than paper filing. When you file electronically, your return is transmitted directly to the IRS computer systems.

Benefits of e-filing:

• Faster refunds: combining e-filing with direct deposit is the fastest way to get your money—often within 21 days.
• Increased accuracy: Tax software automatically checks for mathematical errors and asks you to provide all necessary information, eliminating mistakes.
• Confirmation: You receive an electronic confirmation from the IRS once your return has been accepted.

Paper filing

If you prefer, you can still print and mail your tax return. To do this, you would download the Form 1040 and all necessary schedules, fill them out, and mail them to the IRS service center listed in the form instructions for your state (check the last page of the IRS official Form 1040 instructions). Consider the downsides: paper returns take much longer to process (typically six to eight weeks or more), increase the risk of errors, and don’t guarantee confirmations for the IRS accepting your return.

pdfFiller can help you prepare your Individual Income Tax Return. You can fill out your 1040 form online, ensuring all the information is legible and correctly placed. Once complete, you can print the document for mailing and save the filled PDF in the platform’s secure cloud storage.

What are common mistakes to avoid when filing a 1040?

Even experienced filers make avoidable mistakes on their individual tax return. Here are some common pitfalls to watch out for when you work through your 1040 tax form:

• Wrong filing status
  Claiming head of household without a qualifying child or dependent is a common error.
• Incorrect or missing SSNs/ITINs
  An incorrect SSN for you, your spouse, or qualifying children can block credits like the Child Tax Credit or EITC and delay your refund.
• Forgetting Schedule 1 income or adjustments
  Leaving out unemployment, gambling winnings, or alimony can cause mismatches with IRS records. Forgetting adjustments like student loan interest can also cost you tax savings.
• Not attaching required schedules
  Omitting Schedule A, Schedule C, Schedule E, Schedule SE, Schedule 8812, or other supplementary forms when the instructions require them can result in notices and processing delays.
• Direct deposit errors
  Typing the wrong routing or account number can send your refund to the wrong place or cause it to be rejected. Double-check those digits.
• Missing estimated tax payments on line 26
  If you made estimated payments but forgot to report them, your refund will look smaller than it should.
• Mixing up state and federal taxes
  Don’t misreport state tax payments as federal tax on your Form 1040.
• Improper signatures
  Mailing a paper return without a wet signature—or trying to “e-sign” a paper return that requires a handwritten signature—can invalidate your filing.
• Claiming credits without the required forms
  Claiming education credits without Form 8863, or a foreign tax credit without Form 1116, will likely trigger correspondence from the IRS.

By carefully reviewing your return before filing, you can avoid these common mistakes. This simple step is one of the smartest ways to reduce stress as the 1040 deadline approaches and prevent the need to file an amended return later.

Form 1040 vs 1040-SR vs discontinued 1040-EZ: what’s the difference?

People often wonder about the differences between 1040 and 1040-SR, and what happened to the 1040-EZ form. Let’s clear that out.

Form 1040

Form 1040 is the standard tax form for all individual taxpayers. In 2018, the IRS simplified filing by merging the old 1040A and 1040-EZ into this flexible, two-page form. Taxpayers with more complex finances can attach schedules to report additional income, deductions, or credits. This “building block” design keeps the main form simple for straightforward cases while allowing for more detail when needed.

Form 1040-SR (U.S. Tax Return for Seniors)

Introduced in 2019, the Form 1040-SR is designed for taxpayers aged 65 or older. This is essentially the same form 1040, but with a larger font and an easy-to-read standard deduction chart for seniors. It uses the same 1040 instructions and 1040 schedules as the regular form.

Form 1040-EZ (Discontinued)

The Form 1040-EZ, discontinued after 2017, was the simplest federal income tax return. It was designed for taxpayers with straightforward financial situations. To qualify, you had to be under 65, file as Single or Married filing jointly, have taxable income under $100,000, claim no dependents, and your interest income had to be $1,500 or less. The IRS replaced it with the standard Form 1040 to simplify the tax code.

Other types of 1040 tax forms

The standard Form 1040 is what most taxpayers need to fill out during tax time. However, there are other types of 1040 tax forms you may need to know about. These additional versions support special filing situations, estimated payments, or corrections to a previously filed individual tax return.

Form 1040-NR – U.S. Nonresident Alien Income Tax Return

Form 1040-NR is the individual tax return used by nonresident aliens—people who are not U.S. citizens or resident aliens under IRS residency rules but still have U.S.-source income that must be reported. It applies, for example, to certain international students, scholars, or nonresident workers who earn income from a U.S. employer or U.S. trade or business.

You wouldn’t file Form 1040-NR and Form 1040 for the same year—your residency status determines which one to use. If your status changes during the year or you’re unsure which form to file, check the IRS instructions or consult a tax professional before filing.

Form 1040-ES – Estimated Tax for Individuals

Form 1040-ES is used by freelancers and self-employed taxpayers to calculate and make estimated tax payments throughout the year. It can also be used by taxpayers who expect to owe tax because they don’t have enough withholding on wages, or because they earn income that isn’t subject to regular withholding at all.

The 1040 tax form reports your income and calculates your yearly tax, while Form 1040-ES lets you pay that tax in four quarterly installments. These payments are reported on your 1040 (under estimated tax payments) and reduce what you owe when filing. In short, Form 1040-ES helps you avoid underpayment penalties.

Form 1040-V – Payment Voucher

Form 1040-V is a simple payment voucher that you send with a check or money order when you owe tax with your Form 1040. It is not a separate individual tax return, and it does not replace electronic methods of payment—you only use it if you’re mailing a payment.

You might use Form 1040-V when:

• You file a paper Form 1040 and owe additional tax
• You prefer to mail a check or money order instead of paying online
• You want to ensure that your payment is accurately matched to your 1040 tax form
  

The voucher includes your name, address, Social Security number, the tax year, and the amount you are paying. This helps the IRS apply your payment to the correct individual tax return. By contrast, if you file taxes online and pay electronically, you usually won’t use Form 1040-V at all.

Form 1040-X – Amended U.S. Individual Income Tax Return

Form 1040-X is the form you file when you need an amended 1040—that is, when you want to correct or change a previously filed individual tax return. If you discover that your original Form 1040 had errors, missing income, overlooked deductions, or an incorrect filing status, you use Form 1040-X to fix it.

Form 1040-X shows both the original amounts and the corrected amounts, along with explanations for the changes. While the standard Form 1040 is your original 1040 tax form for the year, Form 1040-X is solely for amending that return. In other words, you don’t replace your original 1040—you supplement it with an amended 1040 so the IRS can see exactly what changed and why.

Final thoughts

Filing your annual income tax return is a legal requirement, but it doesn’t have to be a source of stress. Successfully completing Form 1040 requires attention to detail, accurate record-keeping, and understanding of tax regulations. By understanding the purpose of the Form 1040, gathering your documents, and following the instructions carefully, you can manage your tax filing efficiently.

With pdfFiller, you can access the latest IRS Form 1040 along with all its schedules instantly. Fill out your forms online with our easy-to-use editor, save your work, and print or download your documents when you’re ready.

Explore pdfFiller’s library of fillable IRS 1040 form templates and save time and effort in preparing your taxes.

Glossary

• Adjusted Gross Income (AGI): Your gross income (total income from all sources) minus certain “above-the-line” deductions, such as contributions to an IRA or student loan interest.
• Taxable Income: The portion of your income that is subject to tax. It’s your AGI minus the standard deduction or itemized deductions.
• Standard deduction: A fixed dollar amount that you can subtract from your AGI to reduce your taxable income. It depends on your filing status, age, and whether you or your spouse is blind.
• Tax credit: A dollar-for-dollar reduction in the amount of income tax you owe. Some credits are refundable, meaning you can get them back as a refund even if you don’t owe any tax, while nonrefundable credits can only reduce your tax liability to zero.
• Itemized deductions: Specific expenses (mortgage interest, state and local taxes, medical expenses, and charitable contributions) that you can claim on Schedule A to reduce your taxable income.