if you were due a refund it is now forfeit due to late filing. If you owe the tax authorities can come after you at any time. Turbotax does not support 2017.
to get w-2
1) contact your employer
2) the IRS may have a transcript you'll need to register if you haven't done so already
https://www.irs.gov/individuals/get-transcript
3) pay for copies from the Social Security Admin
https://faq.ssa.gov/en-us/Topic/article/KA-02501
