With TurboTax you cannot E-File a tax return, you can NetFile your own return or the return of someone else who has given you permission to do so on their behalf. 

Instructions for NetFiling your completed TurboTax return can be found in these FAQ links:

In the online edition of TurboTax, how do I submit my tax return to CRA using the NETFILE service?

In the CD/download edition of TurboTax, how do I submit my tax return to CRA using the NETFILE servi...