A First Report of Injury (FROI) is required to establish a claim in the Workers' Compensation Automation and Integration System (WCAIS). We're providing an overview of how the pennsylvania workers compensation system is set up today.We're talking about forms. Sign the return, enclose W-2 forms, PA Schedule SP (if applicable) and mail to: Philadelphia Department of Revenue, P.O. Box 1648, Philadelphia, PA 19105-1648. Fill out the form with a brief description of your situation or call me at (610) 566-0600 and I'll be in touch to schedule a free consultation. It is a way the workers' comp insurance can settle your claim without a lengthy process. Common Workers' Compensation Forms. To file a work-related injury claim, you must complete the City's Accident, Injury, and Illness (COPA II) form.