TurboTax does not have a copy of the W-2 even if you imported it. It would only have a Wage and Tax Statement worksheet that includes the information from the imported or keyed in W-2 and emulates a W-2. The worksheet would be included in the PDF of the tax return if you downloaded the PDF to include All forms and worksheets in the tax year the return was completed.
If you cannot obtain the W-2 from your employer, then for a fee of $37 you can get a complete copy of a W-2 from the Social Security Administration - https://faq.ssa.gov/ics/support/KBAnswer.asp?questionID=3836
You can get a free Wage and Income transcript from the IRS by completing a Form 4506-T - http://www.irs.gov/pub/irs-pdf/f4506t.pdf
See this IRS website for transcripts - http://www.irs.gov/Individuals/Get-Transcript
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 - http://www.irs.gov/pub/irs-pdf/f4506.pdf
See this IRS Tax Topic - http://www.irs.gov/taxtopics/tc159.html
If you need a copy of your W-2 from a previous year and you filed your return with TurboTax you can download the Wage and Tax Statement worksheet that includes the information from the imported or keyed in W-2 and emulates a W-2.
If you need a W-2 to file a prior year return you can request a copy of the W-2 from the IRS at this link Transcript Types and Ways to Order Them