Submitting 5 years of ITR12s to SARS to claim back old medical contributions?

Really love the website and service. Have a question regarding very old tax forms. I have been employed for around 5 years but never submitted an tax return (thus only the IRP5's). I however did contribute to an medical aid of around R1,000 per month for all these years. How far back can I go to claim these refunds?

You can go and submit as old as you need to and ensure that you are up to date with SARS. The sooner the better.

Thanks for the positive words!