If you are referring to how to generate a schedule K-1 from a S-corporation, you would need to use TurboTax Business desktop edition to do that.
https://turbotax.intuit.com/small-business-taxes/
If you are a shareholder of a S-corporation and receive a schedule K-1, you would need to enter it to your TurboTax Premier edition. Here are the steps:
After sign into your account, select Take me to my
return,
At the right upper corner, in the search box, type in schedule
k-1, s corporations
Select Jump to schedule k-1, s corporations
On the screen, Did you receive any Schedules K-1? select Yes to
continue