Whatever you do in private life or as business, you are taxed.
Income tax has to be paid for every individual in South Africa. We will not begin to try to provide this detail, however here is the link to the page on SARS
VAT (Value added tax) of 15% is added to every purchase other than a few basic essentials. If you are not a registered VAT vendor, then you absorb the cost into your expenses, but you cannot claim it back from SARS. Visit the SARS page on VAT
Other taxation comes from the sin taxes, like alcohol and tobacco and levies on petrol and several other products