I know this is an old post, but I'd like to share my experience with this topic. I had to amend my Dad's 2017 return to put in a loss for a Ponzi-scheme that he got sucked into. I've been using Turbotax forever, so I thought it would be easy to just amend the 2017 return and add Form 4684 using the interview questions. However, I got a message saying that Turbotax (I was using Home & Business) does not let you do Form 4684 for theft. I ended up having to buy H&R Block Premium, redoing the 2017 tax return so that I could then amend the 2017 tax return. It was a MAJOR hassle and headache - particularly since the #'s between the two returns on the original 2017 tax return for some reason were coming out differently (because of K-1's I think). Anyway, all this to say that if others have this same problem they are going to have to find something other than Turbotax to do their taxes... and like people have said, from 2018-2025 Ponzi-scheme losses can't be written off. Even though Turbotax failed me on this, after using H&R Block software I DEFINITELY still find Turbotax to be a far superior program to work with.
