<prompt> Human: Credit Karma is rolling out its own tax program which is free right now, and I gave it a spin.I discovered a fairly egregious error in a calculation on Schedule C, basically changing a negative number to a positive number. I contacted them a few ways to point out the error, and their only response was to advise me to enter certain expenses but not all expenses as negative numbers in their workflow to cancel out the error. Its not exactly a response that garners much trust in their application. Watch out!EDIT: By beware I literally mean be wary. This looks like it could be a great alternative service once the bugs are worked out, but I wouldnt recommend using it right now until they are, unless youre comfortable double-checking everything yourself.EDIT2: Credit Karma is aware of the issue and is working on it.I would encourage anyone who is comfortable doing a little error-checking and who is interested in tax software alternatives to try this application out. I found a problem that concerned me, but I dont think that should result in a total condemnation of this web application and its potential.  <response>: I used CK Tax and TurboTax to verify, but ended up having a few oddities in CK Tax that caused me to file with TurboTax instead. Mainly, there were two or three fields I was required to fill out even though I didnt have those deductionscredits selected. On top of that, I couldnt e-file right away - with TurboTax, I had none of those problems. Ill definitely give it a go next year though - I much prefer CK and their mission to Intuits upsell everything attitude. 