You would need at least 2 versions of TurboTax.
TurboTax Home & Business (Desktop download/CD) will allow you to file up to 5 federal e-files, and unlimited paper files. It supports sole proprietor business reporting on Schedule C.
TurboTax Business is required to file an estate return; it also supports non-sole proprietor business returns (C-corp, S-corp, partnership) and prepares K-1 income forms to flow into the individual return if necessary.
