Ct 3a instructions 2026

1. Click ‘Get Form’ to open the CT-3-A instructions in the editor.
2. Begin by entering your corporation's identifying information, including the employer identification number (EIN) and current address in the designated fields.
3. In Part 1, provide general corporate information. Ensure you mark any applicable boxes regarding preferential tax rates.
4. Proceed to Part 2 to compute your balance due or overpayment. Carefully follow the line instructions for each section, ensuring accurate calculations of taxes owed.
5. In Part 3, calculate your combined business income base. Use the provided formulas and ensure all intercorporate transactions are accounted for correctly.
6. Complete Parts 4 through 7 as instructed, ensuring all necessary worksheets are filled out accurately before finalizing your return.

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