Thank you very much for your reply! Yes, in 2017 the amount converted was taxed. I think perhaps I'm just over-thinking and letting myself be confused by the difference between a 401k and a traditional IRA. I think when doing my taxes before, I always just assumed a 401k WAS a traditional IRA. But when reading the information in the TurboTax program this year, I realized it was different, and then wasn't sure how to input my 401k to track its cost basis for my Roth. But since I converted the 401k to a (albeit temporary) traditional IRA before putting it in a Roth, all I need to do is put in that amount which was converted from the traditional IRA. In other words, to track my cost basis for my Roth, TurboTax is asking for previous contributions to my Roth plus the amount converted from the IRA (which was originally a 401k). Does that sound correct?
