For single member LLC that is being treated as a disregarded entity by the IRS use any of the TurboTax desktop editions (Home & Business is recommended) - https://turbotax.intuit.com/personal-taxes/cd-download/
You will be reporting the LLC income and expenses on Schedule C which is part of a personal tax return, Form 1040.
Multi-member LLC's, Partnerships and S Corp returns must use the TurboTax Business Edition - https://turbotax.intuit.com/small-business-taxes/
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.