I doubt that I would be able to do my return on my own without TurboTax; it walks you through all of the deductions you can take if you have contracting income - the portion of your mortgage that applies to your home office, any whole-house improvements you made to your home (heating/roofing/etc.), any improvements you made directly to your home office, depreciation of assets used solely for your job, etc. I'm sure that the ~$50 I spend on TurboTax each year is more than offset by the money it saves me.

Partnerships are very complex returns, and I was able to do a return for that.