If you are trying to file a return & you don't have your W2, you can enter your info into the W-2 section Federal Taxes tab, Wages & Income, Wages and Salaries, Start or Update (estimating income and withholding taxes as accurately as possible). On Do Any of These Apply to this W-2? screen check the box to check "I did not receive a W-2 from (company name) and need to complete a substitute form." then TurboTax will fill out the substitute W-2 form (4852) and include it with your return. You will have to mail in your return, you cannot e-file with the 4852 form.
http://www.irs.gov/newsroom/article/0,,id=106470,00.htmlIf you are looking for W2's for returns you filed, TurboTax does not have copies of W2's, just the information entered into the return. If you are looking for your W2 for 2011 you can sign back into your return, choose Continue a Return and to see the information entered from your W2, for the Home & Business version click on the Personal tab, Personal Income, Explore on My Own, W-2 Income, click Update.
You can get W2 information from the IRS, see the following for information
http://www.irs.gov/taxtopics/tc159.html
