To file an S corp return you need to buy Turbo Tax Business, not to be confused with the personal Home & Business version. Home & Business is just for personal returns that need schedule C for self employment. TT Business is not available to do online or on a Mac. You can buy the Windows Desktop program here,
https://turbotax.intuit.com/small-business-taxes
You can have both a personal program and the Business program installed on the same computer at the same time.
You will get a W2 or K-1 from the business return to enter into your personal return. So you will need to do the Business return first.
Window System Requirements
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
For your personal return you can use either the Online Premier or Self Employed Version. The online Self Employed version is for personal returns that need Schedule C for self employment income (not S corp). Or buy any of the Desktop CD/Download programs for Windows or Mac. All the personal Desktop programs have the same forms, you get more help in the higher versions.
You can start an Online return here,
https://turbotax.intuit.com/personal-taxes/online
You can buy the personal Desktop CD/Download program now here,
https://turbotax.intuit.com/personal-taxes/cd-download
