Get your taxes done using TurboTax

I would enter as a substitute W2.  Form 4852 is a substitute for Form W-2 that taxpayers can complete if they haven't received a W-2.

When you use TurboTax, we'll ask you a few questions to estimate your total wages and withholding using your final pay stub, and fill out Form 4852 based on your answers. The IRS doesn't allow Form 4852 to be filed electronically, so you'll need to print out the necessary forms and mail them to the IRS.

It might take the IRS longer than normal to process your return while it verifies your information.  If you don't mind waiting, you can request an extension. This gives you additional months to get your W-2 and file a return.

• Just keep in mind that you still need to pay any taxes due by the tax deadline, so an extension to file is not an extension of time to pay any taxes you may owe.
• Otherwise, the IRS will add interest and perhaps penalties to the amount due when you eventually file your extended return.

Excerpt from What To Do If You Haven't Received a W-2 - TurboTax Tax