1040 X form

What do I need in order to file a 1040 X form for amending my 2019 taxes?

I accidentally filed my 2018 W-2s instead of my 2019 W-2s.

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The IRS will probably reject your tax return since the income on the return will not match the IRS records. Once the return has been rejected then you can just correct the errors on the 2019 return and re-file.

If the IRS does Accept your tax return then you will have to amend the 2019 tax return using Form 1040X. The amended tax return can only be printed, signed, dated and mailed by you to the IRS. The IRS will take up to 4 months to process the amended tax return.

The 2019 Form 1040X will not be finalized until 01/29/2020. Do NOT change anything on the tax return that was filed. Wait for the IRS to either Accept or Reject the tax return sometime on or after January 27.