Use Form 8866 to figure the interest due or to be refunded under the look-back method of section 167(g)(2) for property placed in service after September 13, 1995, that is depreciated under the income forecast method as described in section 167(g). Current revision Form 8866 PDF Instructions for Form 8866 (Print Version PDF) Recent developments None at this time Other items you may find useful All Form 8866 Revisions Other Current Products Related About Form 1040, U.S. Individual Income Tax Return About Form 1041, U.S. Income Tax Return for Estates and Trusts About Form 1065, U.S. Return of Partnership Income About Form 1120, U.S. Corporation Income Tax Return About Form 1120-S, U.S. Income Tax Return for an S Corporation