If you have not registered as a taxpayer then you need to do so! If you are registered on eFiling you can amend your tax types online: go to your eFiling profile and under the tab "Organisations" click "Request tax type" and insert your tax number under the provisional IRP6 block. You will need to complete an ITR12 and two IRP6 returns every year, learn all about provisional tax here. Don't worry, TaxTim will ask you all the right questions so that you complete your tax return correctly.
No, I am a regular taxpayer
This means that you do not need to register for provisional tax. You will submit only an ITR12 return each year. Let TaxTim help you complete your tax return correctly, and get your maximum allowable tax refund.