Get De Dor 1100-t-ext (formerly 1100-ext) 2017-2025

Filling out the DE DoR 1100-T-EXT form online is a crucial step for businesses seeking an extension for their corporate income tax. This guide provides a clear and comprehensive approach to complete this form accurately and efficiently.

Follow the steps to complete your extension request form.

1. Press the ‘Get Form’ button to access the form and open it in the editor.
2. Enter your account number in the designated field, ensuring it is accurate to avoid processing delays.
3. Provide your business's Federal Employer Identification Number (FEIN). This identifies your business for tax purposes.
4. Indicate your calendar or fiscal year ending date in the appropriate section.
5. Complete the line asking for the due date, which is typically the 15th day of the 4th month following the end of your fiscal year.
6. Fill out the taxpayer’s worksheet, starting with the estimated Delaware taxable income for the year at the top of the section.
7. Follow through the worksheet calculations, ensuring to multiply the estimated taxable income by the corporate income tax rate stated in the form.
8. List the estimated tax paid, then subtract this amount from the calculated tax to find the balance due.
9. If a change form is being filed concurrently, check the appropriate box before moving on.
10. Finally, enter the required personal information including telephone number, signature, date, and email address, ensuring all entries are correct.
11. Review all the information in the form, then save your changes. You may also download, print, or share the form as necessary.

Complete your DE DoR 1100-T-EXT form online to ensure your extension request is processed smoothly.