Form CT-400 - Department of Taxation and Finance - NY.gov 2026

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The document CT-400 is a form used by corporations to file and pay estimated taxes electronically in New York State. It includes sections for corporate identification, tax details, payment information, and certification by an authorized person. Instructions for filing and payment are provided, emphasizing the use of online services.

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Click ‘Get Form’ to open it in the editor.
Begin by entering your Employer Identification Number (EIN) and business telephone number at the top of the form. This information is crucial for identification purposes.
Fill in the return type and state or country of incorporation. Ensure that you accurately indicate the tax sub-type and the tax year, including both beginning and ending dates.
Provide your corporation's legal name, street address or PO box, city, state, and ZIP code. If applicable, include details about foreign corporations regarding when they began business in New York State.
In the payment section, specify the installment payment amount for tax and MTA surcharge. Make sure to enclose your payment as instructed.
Designate a third-party designee if necessary by providing their name, email address, and phone number. Complete the certification section with your printed name, signature, email address, and telephone number.

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What is NY form CT-400?

Form CT-400 provides essential instructions for corporations in New York State to declare estimated taxes. It outlines filing requirements, payment mandates, and crucial deadlines. This guidance ensures compliance with tax regulations and assists corporations in properly managing their tax obligations.

How to pay NYS estimated taxes online?

Pay using your Individual Online Services account From your Account Summary homepage, select the Services menu in the upper-left corner of the screen. Select Payments, bills and notices, then choose Make a payment from the expanded menu. Choose Pay estimated tax as your payment type.

How to pay CT-400?

You can Web File Form CT-400 at .tax.ny.gov. To get started, log in to your Online Services account (or create one). From the Services menu, under Corporation tax, select Make estimated or MFI payment. You can pay directly from your bank account or by ACH credit.

What is the mandatory first installment in New York?

Corporations whose tax liability for the second preceding year ex- ceeds $1,000 are required to pay 25% of the tax liability for the second preceding year as a first installment of estimated tax for the current year (MFI).

Who needs to file NYC 4S?

FILE FORM NYC-4S Corporations (as defined in Section 11- 602.1 of the New York City Administra- tive Code) doing business, employing capital, or owning or leasing property in a corporate or organized capacity, or main- taining an office in New York City must file a General Corporation Tax return.

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What is the NYC 400 form?

Every corporation subject to the New York City General Corporation Tax or Business Corporation Tax (Title 11, Chapter 6, Subchapter 2 or Subchapter 3-A of the Administrative Code) must file a declaration (NYC-400) if its estimated tax for the current year can reasonably be expected to exceed $1,000.

What is form CT 400?

Form CT-400 provides essential instructions for corporations in New York State to declare estimated taxes. It outlines filing requirements, payment mandates, and crucial deadlines.

Why am I getting a letter from NYS Department of Taxation and Finance?

We may communicate with you by mail for many reasons, including: to send you a check for your refund or an additional payment; to let you know we adjusted your refund; to request information that supports what you reported on a return; and.