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Delaware Free Printable  for 2024 Delaware — Declaration of Estimated Fiduciary Income Tax

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More about the Delaware Form 400-EX


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We last updated Delaware Form 400-EX in February 2024 from the Delaware Division of Revenue. This form is for income earned in tax year 2023, with tax returns due in April 2024. We will update this page with a new version of the form for 2025 as soon as it is made available by the Delaware government.

Other Delaware Individual Income Tax Forms:

In addition to information about Delaware's income tax brackets, Tax-Brackets.org provides a total of 65 Delaware income tax forms, as well as many federal income tax forms. Here's a list of some of the most commonly used Delaware tax forms:

Form Code Form Name
Form 200-01 Individual Resident Income Tax Return
Form PIT-NON Non-Resident Individual Income Tax
Form 200-01X Resident Amended Income Tax Return
Income Tax Instructions Delaware Income Tax Instruction Booklet
Form 200-02X Non-Resident Amended Income Tax Return

Download all DE tax forms View all 65 Delaware Income Tax Forms


Disclaimer: While we do our best to keep Form 400-EX up to date and complete on Tax-Brackets.org, we cannot be held liable for errors or omissions. Is this form missing or out-of-date? Please let us know so we can fix it!

Tax Form Sources:

** This Document Provided By Tax-Brackets.org **
Source: http://www.tax-brackets.org/delawaretaxforms/form-400-ex