If you made an S corporation election for your LLC, then you need to file a Form 1120-S.
TurboTax Business can be used to prepare a Form 1120-S but the program cannot be used to prepare a personal income tax return, such as a Form 1040. For the latter purpose you will need a TurboTax personal income tax preparation product, such as TurboTax Premier.
It should also be noted that TurboTax Business is not available as an Online product nor is there a Mac version; it must be installed and run in a Windows environment.
If this is your first year filing for your LLC with an S corporation election, you might want to seek professional guidance and/or return preparation so you get started off properly.
