Ct 1120si 2026

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Click ‘Get Form’ to open the ct 1120si in the editor.
Begin by entering the name of your pass-through entity and its Federal Employer ID Number (FEIN) in the designated fields.
Fill in your Connecticut Tax Registration Number, address, city, state, and ZIP code accurately to ensure proper processing.
Select the type of pass-through entity from the options provided, such as Limited Liability Partnership (LLP) or S Corporation.
Indicate if you are requesting a six-month extension by checking the appropriate box and providing relevant dates for your tax year.
Complete Lines 1 through 3 with your estimated tax liability and any payments made. Ensure that Line 3 reflects any amount due.
Sign and date the form where indicated, ensuring all information is accurate before submission.

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