6012Persons required to make returns of income6013Joint returns of income tax by husband and wife6014Income tax return—tax not computed by taxpayer6015Relief from joint and several liability on joint return6016Repealed. Pub. L. 90–364, title I, § 103(a), June 28, 1968, 82 Stat. 260]Repealed6017Self-employment tax returns6017ARepealed. Pub. L. 101–239, title VII, § 7711(b)(1), Dec. 19, 1989, 103 Stat. 2393]Repealed