Nys-dtf-ct Apr 2026

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

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

: 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. : Used by corporations to report changes to

: Previously used for certain tax payments, these are no longer supported for paper processing as of recent tax years. nys-dtf-ct