Absolutely. The filing of bankruptcy does not alter your obligation to report and file taxes, except perhaps to make it more nessasary. The IRS is a creditor, your return is what will be used to determine how much they have a right to file a claim for. If you do not file, they will either determine your tax....(a bad thing)...and file a claim, or you may not relieve the tax in bankruptcy and be liable in the future. Agreeably, you may have losses, and not have a tax or income to pass to the shareholders...but you would have a loss to pass on.