New checkboxes.   Generally, for any sale of a covered security acquired by an S corporation (other than a financial institution) after December 31, 2011, brokers will be required to report gross proceeds and basis information to S corporations and may not treat them as exempt recipients. New tax classification checkboxes have been added for S corporation and Trust/estate. The Form W-9 is revised to allow S corporations sufficient time to provide new certifications to brokers indicating their non-exempt status. Also, disregarded entity was removed as a tax classification for limited liability companies.