TurboTax cannot mail or email your tax returns to you. If you used the online editions then you can download the PDF of the tax returns yourself.
If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created. TurboTax does not store online any returns completed using the desktop editions.
To access your current or prior year tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)
See this TurboTax support FAQ for accessing prior year online tax returns - https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/01/270...
Or go to this IRS website for free federal tax return transcripts - https://www.irs.gov/individuals/get-transcript
For a fee of $50 you can get a complete federal tax return from the IRS by completing Form 4506 - http://www.irs.gov/pub/irs-pdf/f4506.pdf
TurboTax does not and can not file a tax return for anyone under any circumstances. There are no exceptions. Only the tax filer can click the "FILE MY RETURNS NOW" button and file their return. Additionally, TurboTax can not access any of your returns. For them to do so would be a criminal violation of federal law. Only you can access your returns.
If you used the CD/Desktop version of the program, the only place your return exists is on the hard drive of the computer you used to prepare the return with.
If you used the online version of the program then you must log in to your account using the same exact login credentials that you used to prepare the return.