How do I file a business that is incorporated

For C Corp and S Corp taxes, use our TurboTax Business product. It's available for download here:

https://turbotax.intuit.com/small-business-taxes/

if you need Turbo Tax Business, Turbo Tax Business  is not available to do online or on a Mac.  You can buy the Window's version here.  And you can have both TT Business and TT Home & Business (or any personal version) installed on  your computer at the same time.

https://turbotax.intuit.com/small-business-taxes