Deadwood Act of 1990

Deadwood Act of 1990 - Title I: Repeal of Expired or Obsolete Provisions- Subtitle A: General Provisions - Amends the Internal Revenue Code to repeal various provisions that have expired or are obsolete.

Subtitle B: Modifications to Specific Provisions - Eliminates and revises expired provisions relating to: (1) the net operating loss deduction; (2) the depreciation deduction; (3) the investment tax credit; (4) the deduction for dividends received by corporations; (5) limitations on the percentage depletion allowance in the case of oil and gas wells; and (6) the tax credit for producing fuel from a nonconventional source.

Subtitle C: Effective Date - Makes provisions of this Act effective upon its enactment.

Title II: Provisions Relating to Studies - Extends the due dates for specified studies and repeals the mandates for certain other studies by the Department of the Treasury.

Modifies the study of Americans working abroad under the Foreign Earned Income Act of 1978 to require the Secretary of the Treasury to report as soon as practicable after December 31, 1993, and as soon as practicable after the close of every fifth calendar year thereafter (currently, every fourth calendar year).