What exactly do you mean "Lost"?
Can you not find your tax return on the TurboTax website for online tax returns? If so, which tax year?
Did you use the TurboTax desktop CD/Download editions?
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.
Can you not find your federal or state tax refund information on the IRS or state websites?
If accepted by the IRS use the federal tax refund website to check the refund status - https://www.irs.gov/refunds
If accepted by the state use this TurboTax support FAQ to check the state tax refund status - https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund
