You would need TurboTax Business to prepare an 1120 for the C corporation and a 1065 for the LLC (assuming it is a multi-member LLC). TurboTax Business must be installed in a Windows environment; it is not available online nor will it run natively on a Mac. See https://turbotax.intuit.com/small-business-taxes/
You will also need a TurboTax personal tax preparation product. In order to enter information from a K-1 generated by a 1065, you would need to use TurboTax Premier or Self-Employed if using an online version or any desktop (CD/Download) version.
