The data of the buying/selling would be tracked by software via the stock broker, which would aggregate into a tax form via other software, and then be imported into their taxes by more software.

I think a 1099B at the end of the year coming from whatever company they are using would cover it.

I forget people look at Lemmy on desktop/laptops. I just assume everyone has 15 minutes to kill and picks up there phone and opens the app they prefer, that they put on the second screen, 3rd row, 3rd column from the bottom where it belongs. If you have it somewhere else… Well maybe you have 5 columns instead of 4, or are wrong. But never on the first page … that would be obsessive. It has to hide, lurking on that second page laying in wait. For its 15 mins to shine