Your W-2 should contain several copies (same information) with different letters that identify them. One of them should say, "Copy B to be filed with employee's federal tax return". Look for that copy of your W-2 that was issued to you by your employer. Separate that copy and attach to your mailed Form 1040.
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
