Follow the steps to fill out the IN DoR IT-20X online.

1. Click the ‘Get Form’ button to access the IN DoR IT-20X form and open it in your preferred online editor.
2. Begin by entering your corporation's federal identification number in the upper-right corner of the form.
3. Provide your Indiana taxpayer identification number in the designated area below.
4. Fill in the corporation's name, address, city, county, state, and ZIP code accurately.
5. Answer the questions about your federal amended return status, bankruptcy proceedings, and whether this is your first amended return for the tax year.
6. Complete Part I by summarizing the tax calculations, ensuring all lines are filled as required.
7. Move on to Part II to detail any credits and payments associated with the amended return.
8. In Part III, calculate any remittance due or determine if a refund is applicable based on the summary from Part I and any updates from Part II.
9. In Part IV, include any explanations for changes made, along with necessary attachments or documentation.
10. Finally, review your entries for accuracy and completeness before saving your changes, downloading, printing, or sharing the form.

Start filling out your IN DoR IT-20X online today to ensure your amended return is processed promptly.