What kind of business do you have? If you have a S-corps, C-corps or multi-member partnership you will need TurboTax Business on a Windows computer. And your personal 1040 will have to be prepared using another version of TT. TT Business cannot prepare a Form 1040.
Or do you have a sole proprietorship? If so you put all of your income on the same Form1040 and prepare a Schedule C for your business expenses.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
