Shareholders of Interest Charge Domestic International Sales Corporations (IC-DISCs) use this form to figure and report their interest owed on DISC-related deferred tax liability. Current revision Form 8404 PDF Recent developments None at this time. Other items you may find useful All Form 8404 revisions Other current products Related About Form 1040, U.S. Individual Income Tax Return About Form 1120, U.S. Corporation Income Tax Return