Nys-dtf-ct -

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

: This is the standard return for most general business corporations in New York. nys-dtf-ct

: Used by corporations to report changes to unrelated business income or claim overpayments. Key Publications and Guidelines : The Corporation Tax Modernized E-File Handbook ,

: 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. nys-dtf-ct