Here's how to import a W-2, but it may ask you for some info from the paper copy. If it does, you'll need to get a duplicate copy from your employer, or if it's a large company, some companies (or payroll services) provide copies of W-2's online.
To import, your employer must be a participant in the import process with TurboTax, AND the forms must be ready for importing.
FAQ: How do I import my W-2?
https://ttlc.intuit.com/replies/3389204
