The TurboTax 2018 Home & Business edition for completing a Schedule C if a sole proprietor/independent contractor and which is part of a personal tax return, Form 1040, is available to purchase as a CD or Download from this website - https://turbotax.intuit.com/personal-taxes/cd-download/
The TurboTax 2018 Business Edition for completing a Partnership, C Corp, S Corp, Multi-Member LLC or an Estate or Trust tax return is available from this website - https://turbotax.intuit.com/small-business-taxes/
The TurboTax 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.
