What versions of TurboTax will I need of I have to file income taxes for a c corporation and personal income taxes?

[VolvoGirl]

You will need to use 2 programs.  

For the C corp. you need Turbo Tax Business.   Turbo Tax Business is not available to do online or on a Mac. You can buy the Window's (Win 7 or newer) 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

Then for your personal return you can buy any Desktop version or for next year you can also use the Online version.   The Desktop programs will be available sometime in November here,

https://turbotax.intuit.com/personal-taxes/cd-download/

And the Online will open in December here, https://turbotax.intuit.com/personal-taxes/online/ 

[DoninGA]

For the C Corp you will need the TurboTax Business Edition.  The Business Edition can only be installed on a Windows based personal computer, not on a Mac or online.  The Business Edition cannot complete a personal tax return, Form 1040.

Go to this TurboTax website to pre-order the 2019 Business Edition - https://turbotax.intuit.com/small-business-taxes/

For a personal tax return, any of the TurboTax desktop CD/Download editions can be used.  Recommended for any type of self-employment, the Home & Business edition.

Go to this TurboTax website to pre-order one of the 2019 desktop CD/Download editions - https://turbotax.intuit.com/personal-taxes/cd-download/