Get your taxes done using TurboTax

Depends.  If you mean Turbo Tax Business to prepare a separate Business return like a 1120 corp. or 1065 Partnership LLC or 1041 Estate/Trust return that is only available for Windows and not online or Mac. <a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/small-business-taxes/">https://turbotax.intuit.com/small-business-taxes/...>

If you mean the personal Home & Business program that includes schedule C for self employment sole proprietor etc.  that is both online and Desktop.  In the Online version it is called the Self Employed version.  
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