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Delaware Declaration of Estimated Tax Return & Instructions
Form 400-ES-EX is obsolete, and is no longer supported by the Delaware Department of Revenue.
More about the Delaware Form 400-ES-EX Corporate Income Tax Estimated
We last updated the Declaration of Estimated Tax Return & Instructions in April 2021, and the latest form we have available is for tax year 2018. This means that we don't yet have the updated form for the current tax year. Please check this page regularly, as we will post the updated form as soon as it is released by the Delaware Division of Revenue. You can print other Delaware tax forms here.
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TaxFormFinder has an additional 64 Delaware income tax forms that you may need, plus all federal income tax forms.
| Form Code | Form Name |
|---|---|
| Form 1100 | Corporate Income Tax Return |
| Form 700 | Delaware Income Tax Credit Schedule |
| Form 5403 | Real Estate Tax Return - Declaration of Estimated Income Tax |
| Form 1100-EXT (2014) | Corporation Income Tax - Request For Extension |
| Form 1100S | S Corporation Reconciliation And Shareholders Return |
View all 65 Delaware Income Tax Forms
Form Sources:
Delaware usually releases forms for the current tax year between January and April. We last updated Delaware Form 400-ES-EX from the Division of Revenue in April 2021.
Form 400-ES-EX is a Delaware Corporate Income Tax form. While most taxpayers have income taxes automatically withheld every pay period by their employer, taxpayers who earn money that is not subject to withholding (such as self employed income, investment returns, etc) are often required to make estimated tax payments on a quarterly basis. Failure to make correct estimated payments can result in interest or penalties.
About the Corporate Income Tax
The IRS and most states require corporations to file an income tax return, with the exact filing requirements depending on the type of company.
Sole proprietorships or disregarded entities like LLCs are filed on Schedule C (or the state equivalent) of the owner's personal income tax return, flow-through entities like S Corporations or Partnerships are generally required to file an informational return equivilent to the IRS Form 1120S or Form 1065, and full corporations must file the equivalent of federal Form 1120 (and, unlike flow-through corporations, are often subject to a corporate tax liability).
Additional forms are available for a wide variety of specific entities and transactions including fiduciaries, nonprofits, and companies involved in other specific types of business.
Historical Past-Year Versions of Delaware Form 400-ES-EX
We have a total of three past-year versions of Form 400-ES-EX in the TaxFormFinder archives, including for the previous tax year. Download past year versions of this tax form as PDFs here:
TaxFormFinder Disclaimer:
While we do our best to keep our list of Delaware Income Tax Forms up to date and complete, we cannot be held liable for errors or omissions. Is the form on this page out-of-date or not working? Please let us know and we will fix it ASAP.