While using tax software such as Block's TaxCut or TurboTax from Intuit (nasdaq: INTU - news - people ) certainly can help with the calculations, you still have to input all the information correctly--and to do that it helps to have at least some understanding of the law.
That's why the newest version of TurboTax groups users into seven industries: real estate, online selling (think eBay (nasdaq: EBAY - news - people ) sellers), construction, freelance artists, professional services (programmers, computer consultants), child-care providers and a generic catch-all bucket.