Es 40 2026

1. Click ‘Get Form’ to open the es 40 in the editor.
2. Begin by entering your Social Security Number and your spouse’s if applicable. Fill in your first name, initial, and last name, along with your spouse's details if filing jointly.
3. Provide your present address including street number, city, state, and ZIP code.
4. Complete the worksheet on the back of the form to calculate your estimated tax payment. Enter the state tax due from line J of the worksheet.
5. Fill in your county code and county tax from line K of the worksheet. If applicable, enter your spouse’s county code and county tax from line L.
6. Add lines 1, 2b, and 3b to determine your estimated tax installment payment. Place an 'X' in the box for the appropriate installment period you are paying.
7. Finally, review all entries for accuracy before submitting. If paying by check or money order, ensure it is made payable to the Indiana Department of Revenue.

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