If you are a Single Member LLC that is Not an S Corp then it is a disregarded entity and you file it on Schedule C in your personal tax return.
If you elected to be an S Corp when you set it up you file a separate 1120 S Business tax return for it. You need Turbo Tax Business for an S Corp.The small business program (TT Business) is for 1120 Corporation, 1120S Corp, 1065 Partnership or 1041 Estate/Trust returns and will not do your personal 1040 return. It is a separate program from the Desktop Home & Business program or the Online Self Employed version.
Turbo Tax Business is not available to do online or on a Mac. You can buy the Window's version here. And you can have both TT Business and TT Home & Business (or any personal version) installed on your computer at the same time.
https://turbotax.intuit.com/small-business-taxes
Desktop Windows System Requirements
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
