Treasury Secretary nominee Timothy Geithner implied at his confirmation hearing that the mistakes in his tax returns were caused by his use of the TurboTax software program.  Of course, as any tax professional knows, TurboTax (and any of the other leading software programs) easily calculates self-employment tax (as well as the disallowance of a dependent care deduction for the cost of your kids' overnight camps). The errors here were entirely Geithner's, not TurboTax's.

Editor's note from Hal Netkin: I use TurboTax to calculate my taxes. Never has TurboTax failed to figure in my self-employment tax. President Obama should have appointed me to Treasure Secretary.