It is completely legal to work jobs that pay cash. All it means is that you receive cash for the tasks you complete and that you report your yearly earnings Cash-paying jobs have been around for many years. There is nothing wrong with them, but you can’t use them to avoid paying tax...
People congratulated me when I started paying the mortgage by writing books. Many folks asked if this was a real thing (yes, it is) and if writers could make money doing it (yes, you can). The question I got most often from my fellow creative sorts, though, surprised me. "How do y...