Corporate tax returns, federal and state, are only available using 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.
To pre-order the TurboTax Business Edition for tax year 2019 go to this website - https://turbotax.intuit.com/small-business-taxes/