A friend of mine had a similar issue. She received a lumpsum in 2010 but it was exempted and no tax was assessed. 2011 was a normal year, and she was again assessed: R24 refund.
Now a few months later, she receives a demand for R10k in tax, no explanation and she asked for help. When I had a look, I realised they had reopened the 2010 return and reissued an assessment for that year with R10k tax due on the lumpsum.
Now a few months later, she receives a demand for R10k in tax, no explanation and she asked for help. When I had a look, I realised they had reopened the 2010 return and reissued an assessment for that year with R10k tax due on the lumpsum.