The best way to get a copy of your W-2 is to contact your employer and ask them to send you another one. Many employers make W-2s available for download, so if yours does, it could be a quick and easy solution. If your employer won't comply with your request, you can get a copy of your wage and income transcript from the IRS: It isn't a W-2 but it shows what was reported to them. Here is the link:
https://www.irs.gov/individuals/get-transcript
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