Do I need to do tax return even if I earn less but still have medical aid?

I don't get deducted tax because of low income, but I have a medical aid.. And I was given employee tax certificate also. Do I need to do tax return also? Or is there no need since am not deducted tax..

There is no need because you don't pay any tax, but it is always beneficial to do a tax return so in the event you do start paying tax then SARS cannot come back and expect you to submit for prior years.