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CA FTB Publication 1004, which provides information on how stock compensation is taxed for both residents and nonresidents.
Pennsylvania: Informational Notice Personal Income Tax 2017-01
Section 422: Incentive Stock Options
Proposed Regulations: Application of Section 409A to Nonqualifie...
Treas. Reg. §1.422-1 and §1.422-2: General Rules and ISOs Defined
Treasury Regulation §1.424-1 – Definitions and special rules app...
California EDD Information Sheet on Stock Options
Treasury Regulations §1.6039
AM2012-010 – Allocation of Certain Items Under Treas. Reg. Secti...
Pennsylvania PIT-03-037: Tax Treatment of Qualified Stock Options
Guidance: NY Tax Treatment of Stock Compensation Received by Non...
Analysis: NY Tax Treatment of Stock Compensation Received by Non...
MA Directive 03-12: Taxation of Income Earned by Non-Residents A...
Arizona Individual Income Tax Ruling
Wisconsin Treatment of Stock Options
MA Letter Ruling 82-110: Incentive Stock Options