It sounds like you are looking for a copy of your 2015 W-2. TurboTax does not store your W-2's online. You would need to get a copy of your W-2 from your employer.
For a fee of $50 you can get a complete federal tax return to include copies of W-2's from the IRS by completing Form 4506 - IRS - Get a copy of return
You can also get free transcripts of your federal return from the IRS (will not include your W-2) - IRS - Get a Transcript
See this FAQ for more details: https://ttlc.intuit.com/replies/3301999