W-2's come from your employer, and they have until Jan. 31 to issue it. Some employers allow you to import the W-2 through the software, but for security reasons you still need information from the actual W-2 to import it. So waiting for your employer might be your only choice now . 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
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If you do not have a copy of the W-2 the it cannot be imported, even if it was available to import.
Contact the employer as it should have been provided by the end of January.
If the W-2 will not be provided by the employer then follow the steps in this IRS website - https://www.irs.gov/taxtopics/tc154