Follow the steps to successfully fill out the IN BT-1 online.

1. Press the ‘Get Form’ button to access the BT-1 application and open it in the editing interface.
2. Fill in the 'Taxpayer Information' section by entering your Federal Identification Number in Line 1 and, if applicable, your Taxpayer Identification Number in Line 2.
3. Provide the name of a responsible contact person and their daytime telephone number in Lines 3 and 4.
4. Select the reason for filing from the options available in Line 5.
5. Complete Line 6 with the name of the owner or business entity, ensuring to check the box if the address provided is a foreign address.
6. Enter the business trade name or 'Doing Business As' name, along with the physical location, in Line 7.
7. Indicate the type of organization in Line 8 by checking the appropriate box.
8. For corporations, provide the necessary incorporation details in Line 10 such as state of incorporation and date of incorporation.
9. Enter your North American Industry Classification System (NAICS) code(s) in Line 11.
10. List responsible officers' information, including their social security number, in Line 12.
11. Complete the subsequent sections for any specific tax types you are registering for, based on your business activities listed.
12. Finally, review all entered information for accuracy before saving your progress. After completion, you can download, print, or share the form.

Start filling out the IN BT-1 form online today to ensure your business is properly registered with the Indiana Department of Revenue.