W-2's come from your employer. Ask the employer for another copy. TurboTax cannot get your W-2 for you.
You might need to phone, email and/or snail mail an old employer to make sure they know where to send your W-2.
https://ttlc.intuit.com/questions/2561916-how-can-i-get-a-copy-of-my-w-2
https://ttlc.intuit.com/questions/1934390-how-do-i-import-my-W-2
https://ttlc.intuit.com/questions/2588751-why-can-t-i-import-my-w-2
https://ttlc.intuit.com/questions/2938482-how-do-i-take-a-picture-of-my-w-2-in-turbotax-online
https://ttlc.intuit.com/community/income/help/what-if-it-s-february-but-i-still-don-t-have-my-w-2/00...
https://www.irs.gov/taxtopics/tc154
