This link How do I file a substitute W-2 using Form 4852? has information that you may find useful.
You should consider the following prior to filing a Form 4852:
- Employers have until January 31, 2020, to send out W-2
- You should wait to receive your W-2.
- If you do not receive your W-2 then ask your employer for a copy.
- When filing using Form 4852 you can not E-file your return it will have to be mailed to the IRS.