It depends on what kind of business you started.
If a sole proprietorship or single member LLC, then you need TurboTax Self-Employed if using the online version, or TurboTax PRemier if using the CD/Desktop version of the program.
If your business is an S-Corp, C-Corp, multi-member LLC, partnership, or an LLC that has elected to be "Treated like an S_Corp" for tax purposes, then you need TurboTax Business (different from Home & Business). TurboTax Business is not available as an online product, or for MACs. It's for the windows platform only. You also need to complete and file your business return before you can even start your personal return.
