You would need to use the TurboTax Business Edition (not the Home & Business edition) to complete and file a Form 1120 for a C Corp.
The TurboTax Business Edition can only be installed on a Windows based personal computer, not on a Mac or online.
The TurboTax Business Edition cannot complete a personal tax return, Form 1040.
Go to this website for the prior year, 2018 thru 2016, desktop editions - https://turbotax.intuit.com/personal-taxes/past-years-products/
Go to this website to pre-order the 2019 Business Edition - https://turbotax.intuit.com/small-business-taxes/
