How do I start a 1120S form on Turbotax self-employed online?

[Rainman12]

You can't do that - Must use TT Business, an entirely different program, which must be purchased and installed in Windows.

[Lisa995]

There is no Online version of the software that prepares an 1120S return.   You need TurboTax Business for the S-Corp 1120S return.   You can still use the online version for your own personal return though.

You can purchase the Business program here:
https://turbotax.intuit.com/small-business-taxes/