I earn under the threshold, but should I still register as a taxpayer?

I am a university student and I do "casual work" (babysitting, personal assistant, etc) from time to time as well as tutoring high school subjects. I have never earned more than R3000 a month, thus I know I am below the tax paying threshold. My question is should I still register as a taxpayer or not?

No you do not need to a register as a taxpayer.