CT-300 2026

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The document CT-300 is a form issued by the New York Department of Taxation and Finance for C corporations to report and pay their Mandatory First Installment (MFI) of estimated tax. It outlines the necessary information required for filing, including details about the corporation, computation of MFI, payment instructions, and certification by an authorized person. The form is specifically for corporations subject to various tax articles in New York.

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Click ‘Get Form’ to open the CT-300 in the editor.
Begin by entering your Employer Identification Number and File Number at the top of the form. This information is crucial for identifying your corporation.
Fill in your Business Telephone Number, State or Country of Incorporation, and select the Return Type required for your filing.
Complete the Tax Subtype and Tax Year Ending fields. Ensure you enter the correct MFI due date to avoid penalties.
In the Computation of MFI section, accurately input figures from previous tax years as instructed. This includes Franchise Tax, MTA Surcharge, and any overpayments credited.
Review all entries for accuracy before signing. The Authorized Person must certify that all information is true and complete.

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Versions	Form popularity	Fillable & printable
2022	4.8 Satisfied (26 Votes)
2021	4.3 Satisfied (42 Votes)
2020	4.4 Satisfied (68 Votes)
2019	4.3 Satisfied (141 Votes)
2018	4.4 Satisfied (203 Votes)
2017	4.4 Satisfied (216 Votes)
2016	4.4 Satisfied (308 Votes)

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What is form CT 300?

Most corporation taxpayers are required to e-file Form CT-300, Mandatory First Installment (MFI) of Estimated Tax for Corporations. You can file Form CT-300 online by using our Web File Online Services, or through approved software for corporation tax e-file.

CT-300 2026

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