You file a W2 by submitting it to the IRS using Form 1040 or another tax return form, along with copies to your state tax agency and your employer's records

A W2 form is not something you file on its own — it is a record your employer sends to you and the IRS showing what you earned and what taxes were withheld. Your employer files the W2 with the IRS by January 31 each year. What you do is include the information from your W2 when you file your own tax return, usually by April 15. If you received a W2, you must report that income on your federal return, even if you do not owe taxes.

The process depends on whether you are filing a federal return at all. If your income is below the threshold where you must file, you may not need to submit anything. If you do file, the W2 information goes into your return form — either Form 1040 (the standard federal return) or a simpler form if you may have access to. You will also file a state return in most states, and that return will reference your W2 as well.

Key Takeaways

  • Your employer files the W2 with the IRS; you report the W2 income on your own tax return by April 15.
  • You need a copy of your W2 from your employer before you can file your return — request it if you have not received it by early February.
  • The W2 shows your gross income, federal and state taxes withheld, and Social Security and Medicare taxes, all of which go into your return calculation.
  • You file your return using Form 1040 or a shorter form, either on paper or through tax software, and you must include all W2 income even if no taxes were withheld.

Getting your W2 from your employer

Your employer is required to send you a copy of your W2 by January 31. You should receive it by mail or email, depending on how your employer handles it. Keep this copy — you will need it to file your return. If you do not receive your W2 by early February, contact your employer's payroll or human resources department and ask for it directly.

If your employer goes out of business, closes, or you cannot locate them, you can file Form 4852 (Substitute for Form W2) with the IRS. This form lets you report the income you earned based on your own records — pay stubs, bank deposits, or other documentation. You will need to show what you earned and what taxes were withheld. This is less common, but it is an option if your employer truly cannot provide the W2.

Understanding what is on your W2

Your W2 has several boxes, and each one reports different information. Box 1 shows your taxable wages — the total you earned minus any pre-tax deductions like health insurance. Box 2 shows federal income tax withheld from your paychecks. Boxes 3 and 5 show Social Security and Medicare wages and taxes. Your state and local taxes appear in boxes 19 and 20. You will also see your employer's name and address, your name and Social Security number, and your employer's tax ID number.

Some boxes may be blank if they do not apply to you. For example, if you did not earn tips, box 5 will be empty. If you did not have state income tax withheld, box 19 will be zero. Read through your W2 and make sure your name, Social Security number, and income amounts look correct. If something is wrong, tell your employer right away — they can issue a corrected W2 (called a W2-C) before you file.

Choosing how to file your return

You have three main ways to file: paper, tax software, or a tax professional. Paper filing means printing Form 1040 and mailing it to the IRS address listed on the form. This is slower — it takes weeks to process — but it is free and straightforward if your situation is simple.

Tax software (like TurboTax, H&R Block, or IRS Free File if you may have access to by income) walks you through questions and fills in your return automatically. You enter information from your W2, and the software calculates your refund or what you owe. Most software lets you file electronically, which is faster and you get a confirmation right away. A tax professional — a CPA or tax preparer — will do the work for you, which costs money but is useful if your return is complicated or you have multiple jobs or income sources.

Entering W2 information on your return

When you file Form 1040, you report your W2 income on the "Income" section. If you use tax software, you will enter your W2 information into the interview questions — your gross wages, federal tax withheld, and state tax withheld. The software pulls this from the boxes on your W2 and puts it in the right places on your return. If you file by paper, you copy the numbers from your W2 into the corresponding lines on Form 1040.

The key number is your gross wages (Box 1 on the W2). This is what the IRS uses to calculate your tax. The federal tax withheld (Box 2) is subtracted from what you owe, so if more was withheld than you actually owe, you get a refund. If less was withheld, you owe the difference. You must report all W2 income — the IRS receives a copy of every W2 your employer files, so they will know if you leave one out.

Filing your state return

Most states require you to file a state income tax return if you earned income in that state. You will use the same W2 information — your gross wages and state tax withheld (Box 19 on your W2). Some states use a simple form similar to the federal 1040; others have their own version. You can file your state return through tax software (most software includes state filing), by paper, or through a tax professional.

If you worked in more than one state during the year, you may need to file returns in each state. Some states have agreements to avoid double-taxing you, but you still have to file. Your W2 will show which state the taxes were withheld for. If you moved during the year or worked remotely in a different state, tell your tax software or preparer — the rules vary by state and can affect your refund.

What to do if you made a mistake on your return

If you filed your return and then realized you made an error — or your W2 was corrected after you filed — you can file an amended return using Form 1040-X. This form lets you correct income, deductions, or tax withheld. You file it after your original return, and the IRS will recalculate your refund or what you owe. You have three years from the original due date to file an amended return and claim a refund.

If the IRS sends you a notice saying your return does not match the W2 they received from your employer, respond promptly. Usually this means a number was entered wrong, and you can correct it by sending a letter or filing an amended return. Do not ignore IRS notices — they can lead to penalties and interest if left unresolved.

Keeping records after you file

Keep your W2 and a copy of your filed return for at least three years. The IRS can audit returns going back three years in most cases, and you will need your W2 to prove what you reported. If you file electronically, print or save the confirmation page. If you file by paper, keep the receipt or tracking number the post office gives you.

You may also need your W2 for other purposes — applying for a loan, renting an apartment, or proving income for government programs. Having copies on hand makes these requests easier. Store them in a safe place, either in a file folder or scanned digitally.

Frequently Asked Questions

Do I have to file a return if I only have W2 income?

Only if your income is above the threshold for your filing status. For 2024, a single person under 65 must file if they earned more than $14,600. If you earned less, you do not have to file, though you may want to if taxes were withheld — you could get a refund. Check the IRS website for the current year's thresholds based on your age and filing status.

What if I have multiple W2s from different employers?

Report all of them on your return. Enter each W2's income and tax withheld separately, or let your tax software add them together. The IRS receives copies of all your W2s, so you must report every one. Having multiple W2s does not change the filing process — you just enter more income.

Can I file before I receive my W2?

No. You need your W2 to report your income accurately. If your employer is late sending it, wait until you have it in hand. If it is mid-February and you still do not have it, contact your employer or file Form 4852 using your own records. Filing without your W2 information will likely result in the IRS rejecting your return.

What if my W2 shows the wrong amount of taxes withheld?

Contact your employer and ask them to issue a corrected W2 (Form W2-C). If you already filed your return with the wrong amount, you can file an amended return (Form 1040-X) once you receive the corrected W2. The amended return will recalculate your refund or what you owe based on the correct withholding.

Do I need to send my W2 to the IRS when I file?

No. Your employer already sent the IRS a copy. You only need to report the information from your W2 on your tax return form. Keep your copy for your records, but do not mail it to the IRS unless they specifically ask for it in a notice.