How to file taxes with no w2

You would need your Form W-2 to file. If you have not received the form in the mail you can contact your employer or payroll provider. Here's a Turbo Tax FAQ with additional information: https://ttlc.intuit.com/replies/3301808

the employer does not legally have to issue the W-2 before 1/31/2020.  efiling won't open before then and you can't mail in your tax return without it.