How to withdraw from USC?

I got admitted as a transfer, and I already submitted my SIR(commitment) to USC two weeks ago. However, I decided to attend another university, unfortunately. How do I withdraw from USC in this case? I’ve already looked onto my portal but I couldn’t find any tabs to withdraw. I did not sign up for any orientation and classes yet. Thank you in advance!

If the option is not on your portal, call USC admissions. It will require something in writing - just a brief email - but they can tell you who to send it to.