You must file a claim with the Workers' Compensation Board. File a C-3 employee claim form online, complete as many fields with as much detail as you can and submit.This form enables us to calculate the correct compensation that may be owed to your injured employee. NY Workers' Compensation forms can be hard to understand. Learn more about what forms you need and when to contact an attorney for help in New York. How do I file a claim? When your employee suffers a workrelated injury or illness, there are several steps you must take to get the workers' comp claim filed and benefits approved. This handful of forms include the first report of injury form, a C11, a C240, and a claimant information packet.