After you file

Thank you. In my case that is/was C corporation, would anything change in your previous replies because of that? Regarding the loss to report - should the company provide me some official forms/documents to reflect the fact of the loss or not and instead I could just somehow do that in TurboTax without having any forms from the company? Do I actually *have to* report the loss to IRS or not? In other words - will I experience any problems with IRS including but not excluding fines/fees if I don't report the loss?