If you filed through TurboTax last year it's as simple as contacting TurboTax Technical Support using the "Contact" Button in the upper right corner of the TurboTax page and following the prompts to submit a question or request a call-back.
The representative will be able to look up the status of your prior years tax return (if any)
Unfortunately changes to a filed return must be re-submitted by mail only and therefore you can cannot re-e-file once you have amended the Return.
