If all efforts fail to get a copy of your W-2 then you can file a conventional paper return that includes a substitute W-2 using Form 4852. Please see these FAQs For additional information:
https://ttlc.intuit.com/replies/5451995
https://ttlc.intuit.com/replies/4192470
Please see this FAQ on how to file a prior year return:
https://ttlc.intuit.com/replies/3301770
