Yes, you can, if the additional information was not already in your possession at the time when you have submitted your complaint to the SMC (refer to "Can I submit my complaint without making a Statutory Declaration?"). However, you may wish to first consider if it is necessary, as the submission of additional information at a later stage is likely to prolong the time needed by the Inquiry Committee or Complaints Committee to look into the complaint. You are therefore strongly encouraged to ensure that all necessary, relevant information has been obtained and included into your complaint before submitting it to the SMC. At the submission of any additional information, please explain why such information was not submitted or not available earlier.