File Delaware Tax Returns

At less than $4 billion, Delaware's recent annual tax revenue is lower than most other states. The state also has lower income tax rates than most states. Delaware income tax rates range between 2.2% and 3.9%. Nonresidents with in-state earnings, part-time residents and permanent residents are all required to file an income tax return of some sort. Spouses of deceased taxpayers may file on their behalf.

Different Filing Deadlines

In Delaware, the filling deadline is not the same as the federal deadline. Income tax returns must be postmarked by April 30. This also applies to tax extensions. If a taxpayer files for an extension, they must mail their income tax forms by October 30. To file an extension, you may visit the Division of Revenue's website  or mail a form 1027I. Extensions may be filled anytime between March 1 and April 30.

Taxpayers who discover errors in prior tax filings can file an amended return with the appropriate form. Nonresidents should use a 200-02-X, and residents of must use a 200-01-X.

Mailing Delaware Tax Returns (Original and Amended Returns):

For residents expecting refunds:

PO Box 8765

Wilmington, DE 19899-8765
If owing money:

PO Box 508

Wilmington, DE 19899-508
For nonresidents expecting refunds:

PO Box 8772

Wilmington, DE 19899-8772
If owing money:

PO Box 8752

Wilmington, DE 19899-8752
Any taxpayer not owing money or expecting a refund should mail their return to:

PO Box 8711

Wilmington, DE 19899-8711

Electronic Tracking of a Delaware Tax Refund

To check the status of a refund, you may use the Division of Revenue's electronic tracking tool on their website here. To check the status of a potentially lost return or an amended return, you must call 302-577-8200.

Tax Penalties

If a Delaware tax return is filed late with a balance due, there is a 5% fee each month for the unpaid balance. The maximum accrual is 50% of the original balance due. If a return is filed on time but payment is not made, a fee of 1% of the balance is charged monthly with a total limit of 25%.

If estimated taxes are paid late or are not paid, there is a 1.5% fee charged for the balance due each month until it is paid. This fee may be added to any late tax submissions or underpayments with submissions. If estimated taxes are required, they should be paid on time using Form 200-ESI for Internet payments or Form 200-ES for mailed payments. They can be paid on the Division of Revenue's site with a credit card or by mailing a check to the Division of Revenue at:

PO Box 8735

Wilmington, DE 19899-8735

Note: States & U.S. territories may make changes to their tax laws with little notice. We do our best to keep this information up-to-date, but it is provided on an "AS IS" basis. For more see our terms.