Ct 13 2026

1. Click ‘Get Form’ to open the CT-13 in the editor.
2. Begin by entering the tax period at the top of the form. Ensure that you have your Employer Identification Number (EIN) and file number ready for input.
3. Fill in the legal name of your corporation, along with any mailing name if it differs from the legal name. Include your business telephone number and address details.
4. Indicate if you are claiming an overpayment by marking an X in the appropriate box. Proceed to complete the computation of income and tax section, ensuring all figures are accurate.
5. For any additional sections like Schedule A, provide necessary details regarding your unrelated business allocation, including real estate owned and gross rents.
6. Finally, review all entries for accuracy before submitting. Use our platform’s features to save or print your completed form as needed.

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