Foreign corporations file this schedule to: claim an exclusion of income under section 883 and provide reporting information required by the section 883 regulations. Current Revision Schedule S (Form 1120-F) PDF Instructions for Schedule S (Form 1120-F) (Print Version PDF) Recent Developments None at this time. Other Items You May Find Useful All Schedule S (Form 1120-F) Revisions Other Current Products Related About Form 1120-F, U.S. Income Tax Return of a Foreign Corporation