17 October 2012 at 0:36
Your tax number stays the same, just make sure that it has not been deactivated. This has happened in some cases. You will also need to de-register as a Provisional Taxpayer (this wont affect your tax number) You can do this on eFiling by going to the Home Tab and clicking tax types and de-registering there. This will mean you are only a "regular" taxpayer.