You don’t need to send your original W-2 with your tax return, because the original — Copy A — never passes through your hands. Your employer sends Copy A directly to the Social Security Administration. What you receive is a packet of copies meant for you. If you file on paper, you attach Copy B to your Form 1040. If you e-file, no paper W-2 goes anywhere.1Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3
Which W-2 Copy Is Yours to Send
Federal law requires your employer to furnish your W-2 by January 31 of the year after you earned the wages.2Office of the Law Revision Counsel. 26 U.S. Code 6051 – Receipts for Employees The packet that lands in your mailbox or inbox contains several copies with identical numbers. Only the label differs.
- Copy A goes from your employer to the Social Security Administration. You never touch it.
- Copy B is labeled “To Be Filed With Employee’s FEDERAL Tax Return.” This is the one you attach to a paper 1040.
- Copy C is labeled “For EMPLOYEE’S RECORDS.” Keep it.
- Copy 2 is for a state, city, or local return, if you have one to file.
- Copy 1 goes from your employer to the state or local tax department when required.
Because the figures on every copy are the same, the IRS won’t bounce a paper return just because you accidentally stapled Copy C where Copy B belonged. What matters is that the income and withholding numbers reach the right agency.
If You File a Paper Return
Attach Copy B of every W-2 you received for the tax year to the front of your Form 1040 or 1040-SR. Any schedules and additional forms sit behind the 1040 in order of their attachment sequence number. If you received a corrected W-2c during the year, attach both the original W-2 and the W-2c.3Internal Revenue Service. 2025 Instructions for Form 1040
Leaving the W-2 out of a paper return causes delays. The IRS may hold your refund while it writes to you for the missing form, or process the return and flag the discrepancy later through automated matching.
If You E-File
When you file electronically through tax software, a preparer, or IRS Free File, the W-2 figures go into digital fields and travel to the IRS as data. You mail nothing. You keep the paper copy for your records; the IRS already has the wage data from your employer and compares it against what you entered.
You sign the electronic return with a five-digit Self-Select PIN, verifying your identity with your date of birth plus either your prior-year adjusted gross income or your prior-year PIN.4Internal Revenue Service. Topic No. 255, Signing Your Return Electronically If the IRS has issued you an Identity Protection PIN, use that instead. Acceptance usually comes back within 48 hours.
If Your W-2 Is Missing or Wrong
Employers miss the January 31 deadline sometimes. If yours hasn’t arrived by the end of January, contact the employer to confirm the address on file and that it was sent. If you still don’t have it by the end of February, call the IRS at 800-829-1040 with your Social Security number, the dates you worked, and the employer’s name and address. The IRS will contact the employer and send you Form 4852 to use as a substitute W-2.5Internal Revenue Service. If You Don’t Get a W-2 or Your W-2 Is Wrong The same process applies if the W-2 you received has errors — ask the employer for a corrected form first, and if it isn’t fixed by the end of February, call the IRS.
Form 4852 lets you file on time using estimated wages and withholding. Your final pay stub of the year is the best source for those numbers, and the form asks you to explain how you arrived at them and what you did to get the real W-2.6Internal Revenue Service. Form 4852, Substitute for Form W-2, Wage and Tax Statement Attach Form 4852 to the back of your paper return, ahead of the supporting schedules. Filing with estimates will slow your refund while the IRS verifies the figures, and if the real W-2 arrives later with different numbers, you’ll need to amend the return on Form 1040-X.
What to Do With Your Copy After Filing
Hold onto Copy C for at least three years after you file the return it belongs to. That window matches the general statute of limitations for IRS audits, which gives the agency three years from the filing date to assess additional tax.7Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection If you underreported gross income by more than 25%, the IRS has six years, so keeping records longer is sensible.
If you filed with Form 4852 in place of a missing W-2, the IRS recommends keeping that form until you start receiving Social Security benefits, in case questions come up about your earnings history for that year.8Internal Revenue Service. W-2 – Additional, Incorrect, Lost, Non-Receipt, Omitted