Follow the steps to effectively complete the IN DoR Form ES-40 online.

1. Click ‘Get Form’ button to access the form and open it in the editor.
2. Begin by filling out your personal information. Enter your Social Security number, first name, initial, and last name. If filing jointly, include your spouse's first name, initial, and last name.
3. Provide your current address, including street address, city, state, and zip/postal code.
4. Next, proceed to the Estimated Tax Designation and Payment Area. Complete the worksheet on the back of this form to determine your estimated tax payment. Enter the state tax due from the worksheet on Line 1.
5. On Line 2, enter your county code and the corresponding county tax amount. Complete the same for your spouse’s county on Line 3 if applicable.
6. Add the amounts from Lines 1, 2b, and 3b to find the total estimated tax installment payment, which should be documented on Line 4.
7. Indicate the appropriate installment period by placing an ‘X’ in the box that corresponds to your payment due date.
8. Finally, review your completed form. You can save the changes, download, print, or share the form as needed.

Start filling out your IN DoR Form ES-40 online today to ensure your estimated tax payments are submitted on time.