What Does a Corrected W-2 Look Like? Form W-2c Boxes and Copies

A corrected W-2 arrives on Form W-2c, Corrected Wage and Tax Statement, and its most recognizable feature is that every numbered financial box is split into two side-by-side columns labeled “Previously reported” and “Correct information.” The form uses the same box numbers and categories as the ordinary W-2 you received in January, but only the rows containing an actual correction are filled in. Everything else is left blank. That makes a W-2c look denser than a regular W-2 at first glance, while actually showing you fewer numbers.

The Dual-Column Layout That Defines the Form

Form W-2c is divided into two zones. The upper portion holds identification fields labeled with lowercase letters (Boxes a through i) covering employer information, your name, your Social Security number, and the tax year being corrected. The lower portion holds the numbered financial boxes (1 through 20), and this is where the dual-column design appears.¹

To read the form, scan horizontally across any row. The left column shows what your employer originally reported to the Social Security Administration on your W-2. The right column shows the corrected figure. If Box 1 originally said $45,000 but should have been $45,500, the “Previously reported” column shows $45,000 and the “Correct information” column shows $45,500. Rows that were right the first time stay empty on the W-2c, so a blank row means “no correction to this box.”

There is one wrinkle to that rule. If the corrected amount for a box genuinely is zero, the employer enters “-0-” instead of leaving the box blank, because a blank space would otherwise be read as “no change needed.”² So a “-0-” in the “Correct information” column is meaningful: it tells you the correct figure for that box is nothing, not that the box was skipped.

The Identification Boxes at the Top

The lettered boxes at the top of the form establish whose W-2 is being corrected and for which year. Most of them are self-explanatory, but a few only get filled in under specific circumstances.¹

Box a: your employer’s name, address, and ZIP code.
Box b: your employer’s Employer Identification Number (EIN).
Box c: the tax year being corrected and the form being amended (usually “W-2”).
Box d: your correct Social Security number.
Box e: a checkbox marked only when the correction involves fixing an incorrect SSN or name from the original filing.
Box f: the previously reported Social Security number, filled in only when the SSN itself was wrong.
Box g: the previously reported name, filled in only when the name was wrong.
Box h: your correct first name, middle initial, last name, and suffix.
Box i: your address and ZIP code.

If you are looking at a W-2c that corrects your Social Security number, you will see both Box d (the correct number) and Box f (the old, wrong number) filled in, with Box e checked. If the form only corrects a dollar amount and your name and SSN were right originally, Boxes e, f, and g stay blank.³

The Numbered Financial Boxes

The numbered boxes on a W-2c cover the same categories as a standard W-2. Each appears with its “Previously reported” and “Correct information” columns, but only the boxes containing an actual change carry numbers.¹

Box 1: wages, tips, and other compensation.
Box 2: federal income tax withheld.
Box 3: Social Security wages.
Box 4: Social Security tax withheld.
Box 5: Medicare wages and tips.
Box 6: Medicare tax withheld.
Box 7: Social Security tips.
Box 8: allocated tips.
Box 10: dependent care benefits.
Box 11: nonqualified plans.
Boxes 12a–12d: coded entries for items like retirement plan contributions, health coverage costs, or other special compensation categories.
Box 13: checkboxes for statutory employee status, retirement plan participation, and third-party sick pay.
Box 14: other items the employer needs to report.

A single W-2c often shows only one or two rows with numbers. If your employer misclassified a retirement contribution, for example, you might see Box 1 and Box 12 filled in while every other numbered row is empty. That is normal. The form is not incomplete; it is showing you exactly and only what changed.

State and Local Boxes 15 Through 20

The bottom section of the form handles state and local tax data and follows the same dual-column format.¹

Box 15: state name and your employer’s state ID number.
Box 16: state wages, tips, and other compensation.
Box 17: state income tax withheld.
Box 18: local wages, tips, and other compensation.
Box 19: local income tax withheld.
Box 20: locality name.

If the only thing being corrected is state or local data, your employer sends the SSA copy to the relevant state or local tax agency instead.³ You still receive your copies.

What the Copies in Your Envelope Look Like

Like a standard W-2, a W-2c comes as a set of copies rather than a single sheet. As the employee you should receive at least Copy B (for your federal return), Copy C (for your records), and Copy 2 (for your state or local return).¹ Each copy is identical in content; the label at the top tells you where it is meant to go. Keep the full set together until you have decided whether the correction affects your return.

Reading Your W-2c to Decide What Comes Next

The dual-column format is designed to make the decision easy. Look at the “Previously reported” and “Correct information” columns for each filled-in row and ask whether the change moves your income, your withholding, or a credit-related figure. If it does, you may need to amend the tax return you already filed for that year.

Receiving a W-2c does not automatically mean you have to file an amended return. An amendment is only necessary if the correction actually changes your tax liability, meaning the reported wages, withholding, or credits were wrong in a way that affects what you owe or what you were refunded.⁴ A W-2c that only fixes a misspelled name or a wrong Social Security number, with no dollar changes, leaves your original tax math intact. Keep the form with your records and move on.

If the numbers did change, you file Form 1040-X, Amended U.S. Individual Income Tax Return, and attach Copy B of the W-2c to the front of it.⁵ The W-2c’s layout maps neatly onto the 1040-X: the “Previously reported” column corresponds to your original figures and the “Correct information” column corresponds to the corrected ones.

If the correction points to a refund, you generally have three years from the date you filed your original return, or two years from the date you paid the tax, whichever is later, to claim it.⁶ Miss that window and the refund is forfeited.

A change on your federal return can flow through to your state return as well. If the W-2c changes Box 16 or Box 17, or if the federal correction affects how your state calculates income, you may need to file a state amendment too. Your state tax agency can tell you which form to use.⁴

If your W-2 is wrong and your employer has not sent you a W-2c by the end of February, the IRS will contact the employer and direct it to issue a corrected form within 10 days. You can prompt that process by calling the IRS at 800-829-1040.⁷

1
Internal Revenue Service. Form W-2c, Corrected Wage and Tax Statement
2
Social Security Administration. Helpful Hints to Forms W-2c/W-3c Filing
3
Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026)
4
Internal Revenue Service. Topic No. 308, Amended Returns
5
Internal Revenue Service. Instructions for Form 1040-X
6
Internal Revenue Service. Time You Can Claim a Credit or Refund
7
Internal Revenue Service. If You Don’t Get a W-2 or Your W-2 Is Wrong