Home / Tax Resources / State And Federal / Efile-Delaware-Tax-Return Efile Delaware State Tax Returns Start For Free Delaware State Tax Filing Information The eSmart Tax online tax return filing solution makes it easy to efile your Delaware state tax return using the correct state tax forms. Prepare your full-year resident Delaware state tax return alongside your federal tax return for your convenience. The regular deadline to file a Delaware state income tax return is April 30. Find additional information about Delaware state tax forms, Delaware state tax filing instructions, and government information. eSmart Tax supports the following Delaware Tax Forms (Click here to download Delaware tax forms) Delaware Form 200-01 Individual Resident Income Tax Return Delaware Form 200-V Electronic Filer Payment Voucher Delaware Form DE-8453-OL Delaware Individual Income Tax Declaration for Online Filing Liberty eSpecial: $50 Off Tax Prep! PIN Availability: Type: Notes: Supported Same as federal N/A State DE Website and Contacts State Website http://www.state.de.us/revenue/default.shtml Taxpayer Assistance: (302) 577 8200 Refund Status: (302) 577 8200 Check Refund Status Online: https://dorweb.revenue.delaware.gov/refinq/ State DE Overpayment Option You have the following options: Apply your refund amount to next year's tax payment. Contribute your refund amount to charity. Receive your refund by check through mail. Receive your refund by direct deposit to your bank account. State DE Amount Owe Payment Option You have the following options to pay your tax: Send e-payment through state website. Mail in a check. You need to attach Payment Voucher (Form DE-200V) Mail check to: DELAWARE DIVISION OF REVENUE P.O. BOX 830 WILMINGTON, DE 19899-0830 Special Processing Type: Availability: State-only tax return: Supported Decedent return: Not supported by state e-file Return with foreign address: Supported Signature Form Form Name: Instructions: DE 8453/8453OL Do not mail in DE 8453/8453OL. Keep it for your own record.