Hello

A minor typo like writing "ICSC" instead of "ICSE" in your IB ACIO application form is generally not a serious issue, especially since you've already contacted the helpdesk and taken the right step to correct it. If the rest of your details like your marks, year, and roll number, are accurate and verifiable, such a small error is unlikely to lead to disqualification. However, keep any official documents and your helpdesk communication safe for future reference, especially during document verification.