What goes in each box on the W-2

Your employer fills out most of the W-2 for you — you do not complete it yourself. What you need to do is check that the information your employer reports is correct, and understand what each box means so you can transfer the right numbers to your tax return.

The W-2 has 14 numbered boxes plus several lettered boxes. Box 1 shows your taxable wages for federal income tax purposes. Box 2 shows federal income tax already withheld from your paychecks. Boxes 3 and 5 show Social Security wages and tax withheld. Boxes 7 and 8 show Medicare wages and tax withheld. These are the boxes you will use most often when you file your return.

Boxes 12 and 13 contain codes that describe special types of income or deductions — for example, code D means 401(k) contributions, code V means taxable fringe benefits. Box 14 is a catch-all for state or local information your employer wants to report. You do not need to memorize these codes; your tax software will tell you what to do with them.

Key Takeaways

  • Your employer sends you the W-2 by January 31, and you should receive it even if you no longer work there.
  • Check that your name, Social Security number, and address match your tax records, and that the wage amounts match your final paychecks.
  • If your W-2 is wrong, contact your employer's payroll department in writing and ask for a corrected form; do not guess or change the numbers yourself.
  • You transfer Box 1 (wages) and Box 2 (federal tax withheld) to your Form 1040, and your tax software will guide you through the rest.
  • If you worked for multiple employers, you will receive a separate W-2 from each one, and you must report all of them on your return.

When you receive your W-2 and what to check first

Your employer must send you a W-2 by January 31 of the year after you earned the income. If you left your job during the year, you still receive a W-2 for the wages you earned while you worked there. If you do not receive it by early February, contact your employer's payroll or human resources department.

The first thing to verify is your personal information at the top of the form. Check that your name, address, and Social Security number are exactly as they appear on your tax return and your Social Security card. A mismatch here can delay your refund or cause the IRS to reject your return. If any of this information is wrong, ask your employer for a corrected W-2 when ready.

Next, compare the wage amounts in Box 1 to your final paychecks from that employer. Add up all your paychecks for the year (or look at your last pay stub, which usually shows year-to-date totals) and make sure it matches. Small differences of a few dollars can happen due to rounding, but anything larger should be investigated. If the numbers do not match, contact payroll in writing and keep a copy of your message.

How to report your W-2 on your tax return

When you file your return using tax software or a paper form, you will enter information from your W-2 into the income section. The software will ask you for the amounts from Box 1 (wages, salaries, tips) and Box 2 (federal income tax withheld). These are the two most important numbers on the form.

If you have a 1040-NR (nonresident alien form) or other special return type, the boxes you use may differ slightly, but the software will guide you to the right place. If you worked for multiple employers, you enter each W-2 separately, and the software adds them together automatically.

The information in Boxes 3 through 8 (Social Security and Medicare wages and taxes) is usually reported automatically by the IRS, so you do not need to enter it yourself. However, if you are self-employed or have other income sources, you may need to reconcile these numbers. Your tax software will prompt you if there is a discrepancy.

What to do if your W-2 has an error

If you notice an error on your W-2 after you receive it, do not file your return with the wrong information and do not try to correct it yourself on the form. Instead, contact your employer's payroll department in writing (email is fine, but keep a copy) and describe the error. Ask them to issue a corrected W-2, which the IRS calls a W-2c.

Your employer has until February 28 to send you a corrected form if the error is their mistake. If they do not respond or refuse to correct it, you can file your return using the information you know to be correct (such as your own records of paychecks) and attach a written explanation. The IRS will contact you if there is a mismatch with what your employer reported.

Common errors include wrong Social Security numbers, wages that do not match paychecks, federal tax withheld that is too high or too low, or personal information that is misspelled. These are all fixable, but you have to catch them and report them to your employer first.

Understanding special codes in Box 12

Box 12 can contain up to four separate entries, each with a letter code that describes a type of income or deduction. The most common codes are D (401(k) contributions), E (403(b) contributions), and F (403(b) insurance premiums). These represent money taken out of your paycheck before taxes, so they reduce your taxable income.

Other codes you might see include V (taxable fringe benefits), W (health insurance premiums paid by the employer), and AA (designated Roth contributions). Your tax software will ask you about these codes and tell you where to report them. You do not need to understand what every code means — the software handles the placement for you.

If you see a code in Box 12 that you do not recognize or that seems wrong, ask your employer what it represents. For example, if you see code D but you do not have a 401(k), that is worth investigating. Most of the time, these codes are reported correctly, but it is worth a quick check.

Multiple W-2s and how to combine them

If you worked for more than one employer during the year, you will receive a separate W-2 from each one. You must report all of them on your tax return. Your tax software will have a place to enter multiple W-2s, and it will add up all your wages and all your federal tax withheld automatically.

Make sure you receive a W-2 from every employer you worked for, even if you only worked there for a short time. If an employer does not send you a W-2 by early February, follow up with them. Some employers are slower than others, but they are required to send it by January 31.

When you enter multiple W-2s, the software combines them into one line on your Form 1040. Your total wages from all jobs appear as one number, and your total federal tax withheld appears as another. The IRS receives copies of all your W-2s from your employers, so they will know if you leave one out.

Common mistakes people make when reviewing their W-2

The most common mistake is not checking the W-2 at all and just filing with whatever numbers are on it. Even if your employer is usually accurate, errors happen — a digit gets transposed, a code is entered wrong, or personal information is misspelled. Spending five minutes to verify the information can save you weeks of dealing with the IRS later.

Another mistake is assuming that if you received a paycheck, the W-2 must be correct. Payroll systems and tax reporting systems are separate, and errors in one do not always show up in the other. Your paychecks might be calculated correctly while the W-2 reports the wrong amount to the IRS.

A third mistake is trying to correct the W-2 yourself by writing on it or crossing out numbers. The IRS will not accept a marked-up W-2. If there is an error, you must get a corrected form from your employer. If you file with a W-2 you have altered, the IRS will reject it or flag it for review.

Frequently Asked Questions

What if I lost my W-2 or never received it?

Contact your employer and ask for a duplicate copy. If your employer is out of business or unreachable, you can call the IRS at 800-829-1040 and ask them to request a copy from your employer on your behalf. You can also file your return using your own records of income and withholding, but the IRS will likely contact you to verify.

Can I file my tax return before I receive my W-2?

You can file early if you have all the information from your paychecks, but you must report your W-2 information once you receive it. If you file before your W-2 arrives and the numbers are different, you will need to file an amended return. It is usually better to wait until you have all your W-2s in hand.

What does it mean if Box 2 (federal tax withheld) is zero?

It means no federal income tax was taken out of your paychecks. This can happen if you claimed too many exemptions on your W-4, or if your income was low enough that you were not required to have taxes withheld. You may owe taxes when you file, or you may still receive a refund depending on your total income and deductions.

Do I need to attach my W-2 to my tax return?

No. You keep your W-2 for your records, but you do not send it to the IRS. The IRS receives a copy directly from your employer. If you file electronically, the software transmits your information without the physical form. If you file on paper, you do not include the W-2 unless the IRS specifically asks for it.

What if my W-2 shows income I did not earn?

Contact your employer when ready and ask them to investigate. This could be a data entry error, a mix-up with another employee's records, or fraudulent activity. Ask for a corrected W-2 in writing. If your employer refuses or cannot fix it, you can file your return with a written explanation attached and let the IRS sort it out.