For its part, IRS will offer assistance for missing forms until the 14th of February only. If after that time your forms are still missing, then it is time to make a move. Call the IRS at 800-829-1040. You will be asked to provide for your personal information. Look up for the figures before you make the call, especially concerning your earnings.
After this, expect the IRS to contact your employer with the Form 4598 (Form W-2 Not Received, Incorrect or Lost). You should receive a copy of this form and a copy of Form 4852 (Substitute for Form W-2). Keep these documents because you can use them in case your official forms remain missing at the filing deadline.