Internal Revenue Code section 108 allows taxpayers to exclude from gross income amounts attributable to discharge of indebtedness in title 11 cases, insolvency, or qualified farm indebtedness. Code section 1081(b) allows corporations to exclude from gross income amounts attributable to certain transfers of property. The data is used to verify adjustments to basis of property and reduction of tax attributes.
The latest form for Reduction of Tax Attributes Due to Discharge of Indebtedness (and Section 1082 Basis Adjustment) expires 2021-09-30 and can be found here.