There is only one way to complete and file a Form 1120-S using TurboTax. You will need to purchase and download the TurboTax Business Edition. The Business Edition can only be installed on a Windows based personal computer. The Business Edition cannot be used for a personal tax return, Form 1040.
Go to this TurboTax website for the Business Edition - https://turbotax.intuit.com/small-business-taxes/cd-download/
