What is untaxed income?

So I talked to my mom (sorry for the late response), and yes, she DID file. SHE DID FILE FOR THE EXTRA INCOME. I was mistaken and thought she didn’t due to how low it was. Again, I don’t know much about tax, so sorry for wasting people’s time. In other words, yes we did pay tax on everything, so there’s no “untaxed” stuff. To be honest, I felt really personally hurt that I was called names. I am NOT THAT. I worked HARD. So sorry everyone!