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Delaware Declaration of Estimated Fiduciary Income Tax
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Extracted from PDF file 2025-delaware-form-400-ex.pdf, last modified June 2024Declaration of Estimated Fiduciary Income Tax
D ELAWARE DIVISION OF REVENUE F 2 O0 2R 5 M FID-EST Declaration of Estimated Fiduciary Income Tax RESET Taxpayer ID Tax Year 2025 Quarter 1 Due By PRINT Apr 30, 2025 Fiscal Year End Name of Trust or Estate Name of Fiduciary 1. AMOUNT OF THIS INSTALLMENT .00 Title of Fiduciary 2. AMOUNT OF THIS INSTALLMENT PAYMENT .00 Street Address City State Zip Code MAIL COMPLETED FORM WITH REMITTANCE PAYABLE TO: Delaware Division of Revenue PO Box 2044 Wilmington, DE 19899-2044 BE SURE TO SIGN YOUR RETURN BELOW AND KEEP A COPY FOR YOUR RECORDS Under penalties of perjury, I declare that I have examined this return, including accompanying schedules and statements, and believe it is true, correct and complete. If prepared by a person other than taxpayer, the declaration is based on all information of which the preparer has any knowledge. SIGNATURE OF FIDUCIARY OFFICER OR REPRESENTATIVE DATE TITLE OF OFFICER PHONE NUMBER EMAIL ADDRESS DO NOT CUT THIS PAGE DFFIDEST2025019999V1 Revision 20240627 Page 1
Form 400-EX
More about the Delaware Form 400-EX Individual Income Tax TY 2025
Residents of every estate or trust use Form 400-EX to file their income tax returns for that taxable year.
We last updated the Declaration of Estimated Fiduciary Income Tax in March 2026, so this is the latest version of Form 400-EX, fully updated for tax year 2025. You can download or print current or past-year PDFs of Form 400-EX directly from TaxFormFinder. 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 200-01X | Resident Amended Income Tax Return |
| Form 200-02X | Non-Resident Amended Income Tax Return |
| Form IRA | Special Tax Computation for IRA Distributions |
| Nonresident Income Tax Instructions | Non-Resident Individual Income Tax Return – Instructions for Form (PIT-NON) |
| Form 200C | Composite Income Tax 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-EX from the Division of Revenue in March 2026.
About the Individual Income Tax
The IRS and most states collect a personal income tax, which is paid throughout the year via tax withholding or estimated income tax payments.
Most taxpayers are required to file a yearly income tax return in April to both the Internal Revenue Service and their state's revenue department, which will result in either a tax refund of excess withheld income or a tax payment if the withholding does not cover the taxpayer's entire liability. Every taxpayer's situation is different - please consult a CPA or licensed tax preparer to ensure that you are filing the correct tax forms!
Historical Past-Year Versions of Delaware Form 400-EX
We have a total of three past-year versions of Form 400-EX in the TaxFormFinder archives, including for the previous tax year. Download past year versions of this tax form as PDFs here:
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