Corporation tax e-file forms and publications
The following tax year e-file forms and publications can be downloaded and printed using Adobe Reader .
2026 Publications
Publication number
Title
Publication 115
Corporation Tax Modernized E-File Handbook For Software Developers Tax Year 2026 (TBA)
Publication 116
Corporation Tax Modernized E-File Handbook For Tax Practitioners Tax Year 2026 (TBA)
Publication 75-B New York State Specifications for Electronic Bulk Payments of Estimated Tax For Corporate Partners Tax Year 2026 (Posted September 30, 2026)
2026 Forms
Form number
Title
TR-579-CT New York State E-File Signature Authorization for Tax Year 2026 For Certain Corporation Tax Returns and Estimated Tax Payments for Corporations (Posted September 30, 2026)
TR-579.1-CT New York State Authorization for Electronic Funds Withdrawal for Tax Year 2026 Corporation Tax Extensions (Posted September 30, 2026)
Letter of Intent Letter of Intent (LOI) to Develop MeF Corporation Tax E-file Software for Tax Year 2026 Posted (September 30, 2026)
2025 Publications
Publication Number
Title
Publication 115 Corporation Tax Modernized E-File Handbook For Software Developers Tax Year 2025 (Posted November 26, 2025)
Publication 116 Corporation Tax Modernized E-File Handbook For Tax Practitioners Tax Year 2025 (Posted January 13, 2026)
Publication 75-B New York State Specifications for Electronic Bulk Payments of Estimated Tax For Corporate Partners Tax Year 2025 (Posted November 3, 2025)
2025 Forms
Form number
Title
TR-579-CT New York State E-File Signature Authorization for Tax Year 2025 For Certain Corporation Tax Returns and Estimated Tax Payments for Corporations (Posted August 20, 2025)
TR-579.1-CT New York State Authorization for Electronic Funds Withdrawal for Tax Year 2025 Corporation Tax Extensions (Posted August 20, 2025)
Letter of Intent Letter of Intent (LOI) to Develop MeF Corporation Tax E-file Software for Tax Year 2025 (Posted September 25, 2025)
2024 Publications
Publication number
Title
Publication 115 Corporation Tax Modernized E-File Handbook For Software Developers Tax Year 2024 (Posted November 18, 2024)
Publication 116 Corporation Tax Modernized E-File Handbook For Tax Practitioners Tax Year 2024 (Posted January 2, 2025)
Publication 75-B New York State Specifications for Electronic Bulk Payments of Estimated Tax For Corporate Partners Tax Year 2024 (Posted August 20, 2024)
2024 Forms
Form number
Title
TR-579-CT New York State E-File Signature Authorization for Tax Year 2024 For Certain Corporation Tax Returns and Estimated Tax Payments for Corporations (Posted August 20, 2024)
TR-579.1-CT New York State Authorization for Electronic Funds Withdrawal for Tax Year 2024 Corporation Tax Extensions (Posted August 20, 2024)
Letter of Intent Letter of Intent (LOI) to Develop MeF Corporation Tax E-file Software for Tax Year 2024 (Posted September 12, 2024)
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Updated: September 30, 2026