You must register as a taxpayer with the South African Revenue Service (SARS) if you earn more than a specific amount that is determined every year. You must register within 60 days of receiving income. Register as a taxpayer, by completing an IT77 registration form which can be obtained from the SARS website.
How to submit an income tax return – individuals
Once you have been registered for tax and given your tax number, you can register for eFiling on www.sarsefiling.co.za and file income tax returns online when tax season starts. If you do not register for eFiling, SARS will send you a form that you must complete and send back.
You must submit a tax return to SARS in order for SARS to calculate whether you must pay more tax or whether they must give you a refund. Income tax is the normal tax which is paid on your taxable income.