Delaware — Underpayment of Estimated Taxes
More about the Delaware Form PIT-UND Estimated
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File Now with TurboTaxWe last updated Delaware Form PIT-UND 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 |
| Form PIT-RSA | Schedule A - Itemized Deductions |
| Form 200-02X | Non-Resident Amended Income Tax Return |
View all 65 Delaware Income Tax Forms
Disclaimer: While we do our best to keep Form PIT-UND 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 Is this form missing or out-of-date?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:
- Delaware Division of Revenue ( http://revenue.delaware.gov/ )
- Division of Revenue Income Tax Forms ( http://revenue.delaware.gov/services/2010PITForms.shtml )