How can I file my taxes now? I don't have a w2 form yet.

[fanfare]

Why do you want to file now, when you do not have your W-2 yet ?

[SweetieJean]

(the usual reason...to get a refund ASAP)

[jerry2000]

The simple answer is that you can't. You need your W-2s and other income documents that you will get in Jan/Feb. Further, the IRS will not accept returns before Jan 23. Turbotax has not yet announced when they will begin to "stockpile" returns in advance of the IRS acceptance date.

[SweetieJean]

and most of the State forms are not ready yet.

[VolvoGirl]

And see these,  The IRS will open efiling on Jan 23, 2017  https://www.irs.gov/uac/2017-tax-filing-season-begins-jan-23-for-nations-taxpayers-with-tax-returns-...    

 IRS warns of refund delays  https://www.irs.gov/individuals/refund-timing