I did my taxes in both last year (started in TurboTax and learned about their abuses - a coworker suggested Credit karma) and found the numbers to be identical.

I did my taxes in both last year (started in TurboTax and learned about their abuses - a coworker suggested Credit karma) and found the numbers to be identical. My taxes are relatively complex, more than most people. I'm very happy with the service for the second year in a row. I admit that they don't have quite the community links that TurboTax does, and there are some situations they won't handle (for instance, income from 2+ states)