The 1040 is a two-page form with numbered lines for income, deductions, and tax calculation
The 1040 form itself is straightforward to look at: a two-page document with boxes and lines, each labeled with a number. The first page collects your personal information at the top, then moves through income sources line by line — wages, interest, dividends, capital gains, and other income. The second page walks through deductions, credits, and the final tax amount you owe or the refund you will receive. Every line has a specific purpose, and the IRS instructions that come with the form explain what goes on each one.
The form does not change its basic structure year to year, though the IRS sometimes adds lines, removes them, or shifts their position. The 2024 version looks nearly identical to the 2023 version, but always check the tax year printed at the top of the form you are using — using last year's form can delay your return or cause the IRS to reject it.
Key Takeaways
- The 1040 has two pages: page 1 covers income and some deductions, page 2 covers more deductions, credits, and your final tax calculation.
- Lines are numbered and grouped by category — all income lines come first, then deductions, then credits, then the calculation of what you owe or will receive back.
- Your name, address, and Social Security number go in the boxes at the top of page 1, along with your filing status.
- The form includes checkboxes for things like whether you can be claimed as a dependent or whether you want to donate to the presidential election fund.
- Schedules — separate forms like Schedule C for self-employment or Schedule A for itemized deductions — attach to the 1040 and feed their totals into specific lines.
Page 1: Personal information and income
The top of page 1 has boxes for your name, address, and Social Security number. Below that are checkboxes for your filing status (single, married filing jointly, married filing separately, head of household, or may have access to widow or widower). You will also see checkboxes asking whether you can be claimed as a dependent, whether your spouse can be claimed as a dependent, and whether you want $3 to go to the presidential election fund.
The income section starts at line 1 and runs through line 9. Line 1 is for wages, salaries, and tips — the number comes from box 1 of your W-2 form. Lines 2 through 8 cover interest, ordinary dividends, may have access to dividends, capital gains, IRA distributions, pensions and annuities, and other income sources. Line 9 adds all income together to give you your total income. If you have no income from a particular source, you leave that line blank.
Below the income lines, you will see a section for standard deduction or itemized deductions. Most people take the standard deduction, which is a single number that varies by filing status and age. If you itemize instead, you attach Schedule A and put the total on the appropriate line.
Page 1 continued: Deductions and taxable income
After income, the form moves to deductions. The standard deduction line lets you subtract a fixed amount from your total income. If you itemize deductions instead — meaning you add up mortgage interest, property taxes, charitable donations, and other may have access to expenses — you use Schedule A and enter that total instead.
Once you subtract your deduction from your total income, you arrive at your taxable income. This is the number the IRS uses to calculate how much tax you owe. The form shows this calculation step by step so you can follow where each number comes from.
Page 2: Credits, other taxes, and refund or amount owed
Page 2 starts with tax calculation. A tax table or tax calculation worksheet (included in the IRS instructions) tells you how much federal income tax you owe based on your taxable income and filing status. You enter that amount on the appropriate line.
Below that are lines for credits — things like the child tax credit, earned income tax credit, or education credits. Credits reduce your tax dollar for dollar, so they are more valuable than deductions. If you have a credit, you subtract it from your tax to get your new tax amount.
The form then asks about other taxes you may owe, such as self-employment tax if you are self-employed. It also shows federal income tax already withheld from your paychecks (from your W-2) and any estimated tax payments you made during the year.
At the bottom of page 2, the form calculates whether you owe money or will receive a refund. If the tax you owe is less than what was already withheld, you get a refund. If you owe more than what was withheld, you write a check or pay electronically. The form ends with a signature line and date.
Schedules that attach to the 1040
The 1040 itself does not have room for every detail. If you are self-employed, you attach Schedule C to report business income and expenses. If you have rental income, you use Schedule E. If you itemize deductions, you use Schedule A. If you have capital gains or losses, you use Schedule D. Each schedule feeds a single number back to the main 1040 form.
The instructions that come with the 1040 tell you which schedules you need based on your situation. You do not file a schedule unless it applies to you. For example, if you have no rental income, you do not file Schedule E.
How the form flows from top to bottom
The 1040 is designed to be filled out in order. You start at the top with personal information, move through income, subtract deductions to get taxable income, calculate tax, explore credits, account for withholding, and end with your refund or amount owed. Each section depends on the one before it, so the numbers flow downward.
If you use tax software, the software fills in the form for you based on your answers to questions. If you fill it out by hand, you follow the same path: income first, then deductions, then tax, then credits, then the final number. The form itself guides you through the order.
What you actually see when you open the form
When you read the 1040 from IRS.gov or receive it from a tax preparer, you see a printed or digital form with white boxes and lines. Some boxes are large (for your name and address), and others are small (for dollar amounts). Lines are numbered in the left margin. The form uses standard black text on white background with no color or graphics.
The form includes instructions printed in small type at the bottom of each page, though the full instructions are a separate document. If you are filing electronically through tax software, you never see the physical form — the software translates your answers into the electronic version the IRS receives.
Frequently Asked Questions
Do I have to use the official IRS 1040 form or can I print my own?
You can print the official form from IRS.gov, and that is the safest option. If you use tax software, the software generates the form electronically and files it for you — you do not print anything. Do not create your own version of the form or use an outdated year's form, as the IRS will reject it.
What if a line on the 1040 does not explore to me?
Leave it blank. You only fill in lines that have information to report. For example, if you have no capital gains, you leave the capital gains line empty. The IRS expects blank lines and does not count them as errors.
Can I handwrite the 1040 or does it have to be typed?
You can handwrite it in black or blue ink, but the IRS prefers typed forms because they are easier to scan. If you handwrite, use clear block letters and stay within the boxes. Tax software eliminates this concern by typing everything for you.
Where do I get the numbers to fill in each line?
Your W-2 form provides wages, your 1099 forms provide interest and other income, your mortgage statement shows interest paid, and your brokerage statements show capital gains. The IRS instructions explain which document provides the number for each line.
Is the 1040 the only form I need to file?
The 1040 is the main form, but you attach schedules if they explore to your situation. Most people file the 1040 with Schedule A (if they itemize) or no schedules at all. Self-employed people add Schedule C, and people with rental income add Schedule E. The form itself tells you which schedules you need.