Follow the steps to successfully fill out the AL DoR 40V form online.

1. Click ‘Get Form’ button to obtain the form and open it in the editor.
2. Begin with the primary taxpayer's first name. Enter the first name as it appears on your tax return.
3. Next, provide your mailing address information, including the street address, city, state, and ZIP code.
4. Complete the spouse’s first name and last name fields if applicable.
5. Select the tax type by marking the box for 'IIT' which stands for Individual Income Tax.
6. Indicate the tax period by selecting the box corresponding to December 31, 2020.
7. Enter the primary taxpayer's Social Security Number (SSN) in the designated field.
8. If applicable, enter the spouse’s SSN in the designated field.
9. Choose the applicable tax form by marking one of the boxes: Return, Amended, or Automatic Extension Payment.
10. Fill in the amount due, ensuring it matches the total tax liability calculated.
11. Provide a daytime telephone number for any inquiries regarding your submission.
12. Before finalizing your submission, remember to double-check that all fields are completed accurately.
13. Once all information is verified, save your changes, download the form, and print if necessary for mailing.

Complete your AL DoR 40V form online today to ensure timely filing of your income tax payment.