21 October 2012 at 0:21
Firstly you are earning enough to pay tax as the minimum threshold is R63 556 per year and so your boss should be deducting PAY-AS-YOU-EARN each month and paying that over to SARS. You should also be registered as a taxpayer as you are salaried.
If your boss isn't informing SARS of your existence and not paying over your PAYE then in theory they do not know about you, but at some point they will. Your boss is acting against the laws of the Income Tax Act and has a duty to pay over employee's tax on your behalf. There will be serious fines and penalties if he does not and you can get into a lot of trouble as well. All the staff earning over the threshold need to be registered and your boss needs to be registered as well.