I have submitted my tax return and was owed by SARS then was asked to submit supporting docs. I submitted the docs but still waiting for one doc from the company I used to work for. Now when I try to submit the outstanding doc I discovered that I have been assessed and I owe SARS now. The 21 days are not yet over and I cant ever ask for correction. Is there a way I can submit this outstanding doc and get a reassessment?