In another thread, user @jhanley86 commented:
I am having the same issue. I think this is because of any cryptocurrency gains. The platforms are pass through businesses I believe which means they pass down the tax responsibility to you to avoid the "business" tax and they can file as an individual. I am not 100% yet that I am correct, but it is my assumption from what I've been reading.
While this doesn't pertain to my personal situation (I have not attached any crypto forms to my return), it could be something for others to consider.
