Nys-dtf-ct 【2026 Update】

The most "interesting" aspect for filers currently is the . Primary Corporation Tax Forms

: The Corporation Tax Modernized E-File Handbook , which details the technical requirements for filing and recent changes for the 2025 tax year. nys-dtf-ct

: Previously used for certain tax payments, these are no longer supported for paper processing as of recent tax years. The most "interesting" aspect for filers currently is the

If you are looking for a deep dive (a "paper") on how these taxes work, these official handbooks are the best resources: If you are looking for a deep dive

: Used by corporations to report changes to unrelated business income or claim overpayments. Key Publications and Guidelines

: This is the standard return for most general business corporations in New York.

: Most corporation tax extensions and estimated tax payments must be filed electronically . Paper versions of these extensions (except Form CT-5.1) are generally no longer accepted for processing.