How do I request an extension of the Top-Screen filing deadline?
You must send in your extension request by USPS or special delivery. Do NOT FAX your extension request to the CSAT Help Desk. By mail — C/O Dennis Deziel Chemical Security Compliance Division Office for Infrastructure Protection U. S. Department of Homeland Security Mail Stop #8100 Washington, DC 20528 By delivery service — C/O Dennis Deziel Chemical Security Compliance Division Office for Infrastructure Protection Mail stop #8100 U. S.