You can file without a W-2 if you want, but if you do you run the risk that the information on your W-2 will be different than what you entered on your return. Then you'll be faced with having to do an amended return. It's usually best to wait until you have all your documents in hand. Also, the IRS doesn't even begin processing returns until late January.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
