I have submitted IRP5 forms from 2009 and have received four SMS's stating the following 1st SMS "thank you for filing your 2009 tax return result -R534 acc balance -R985." 2nd sms for 2010 return results "-R300 account balance -R451." 3rd sms for 2011 assessment result "-R151 acccount balance -R151." The 4th sms for 2012 assessment result "R0 account balance R0." Please explain what do these sms's mean and what does it mean on the sms when it says, "audit:no?"