Most everyone in the US files. Even if the gov withheld taxes from your payroll you still file. The gov knows how much you made, now you have to arrive at the same number or you can get fined if you claim more and they catch you in an audit.
What's funny is, on the tax form there's a field asking if you got money from illegal activity like selling drugs.....they expect you to declare it and pay the percentage.... The ultimate gov will look the other way as long as they get their cut.
I certainly did.... I ve been saying that all that beachfront land is too valuable to developers to not use as a tourist spot.