If you cannot obtain the W-2 from your employer, then for a fee you can get a complete copy of a W-2 from the Social Security Administration - https://faq.ssa.gov/ics/support/KBAnswer.asp?questionID=3836
You can get a free Wage and Income transcript from the IRS - https://www.irs.gov/individuals/get-transcript
There is no penalty for filing a tax return after the due date if you are owed a tax refund or there are no taxes owed on the return. If you do have taxes owed on the tax return there will be failure to file and failure to pay penalties along with interest. The IRS will send you a bill in the mail for the penalties after they receive your tax return and the tax payment.
Go to this TurboTax website to purchase a download of the prior year (2014 thru 2016) desktop editions - https://turbotax.intuit.com/personal-taxes/past-years-products/
Note - Each tax year is a separate program
A prior year tax return can only be printed and mailed, it cannot be e-filed.
When mailing multiple tax years use a separate envelope for each year. Also consider using a tracking service from the Post Office so that you will have proof the tax returns were received by the IRS.
