As others have said, you can but you shouldn't. You don't file a W-2; you file your tax return (one for all your income for the entire year) and includes information from the W-2 (technically, your employer files (that is, send to the IRS) the W-2 and you just use the information on it in preparing your return (although if filing on paper, you send in one of your copies of your W-2 but you're doing that more as proof of the taxes withheld that you're claiming as payments rather than to "file" it).
