To enter special characters like / in the IRCC address field, you should try replacing the / with a space or leave it out altogether, as the system may not accept slashes. If the address 4A/2 is important for matching your ID, try entering it as 4A 2 or 4A2. However, if the application still doesn’t accept the format, contact the IRCC support team for guidance on how to proceed without causing discrepancies with your ID proof.