State income taxes

Foreign tax status at the state level

Index of State Income Tax Resources

November 13, 2025

1. Overview of Foreign Tax Status for States 2. How the Constitutional Separation of Powers between States and the National…

Fed-State Cooperation Program Repeal in 1990

November 13, 2025

EXECUTIVE SUMMARY: The Internal Revenue code sections 6362 through 6399 originally implemented the Fed-State Cooperation program. These sections were repealed…

DOCTRINE: Unconstitutional Conditions Doctrine applied to Federal and State Income Taxation

June 21, 2025

EDITORIAL: The application of the UCD has never been addressed or settled in the context of taxation. Only in other…

Definitions of Corporate Federal “State” within State Revenue Codes

January 6, 2025

Definitions by corporate Federal “State” for “in the state”, “in this state”, “within the state”, “within this state” and “this…