Earns less than R200 000.00 why submit to SARS?

My wife earns less than R200 000. 00 per year. Should she submit returns. She registered 4 years ago to do the right thing. But she never earned more to submit. Now she got a sms to say she must submit or she must pay penalties. Please help thanks

She must always submit to be compliant. Unfortunately SARS does not always stick to their policy of who needs to file or not so we always suggest filing every year to be sure.