DELAWARE Tax Forms and Instructions
Below are the relevant links for DE State Tax information.
Deleware State Mandate Acceptance in the Delaware e-file program is automatic with acceptance in the federal e-file program. ERO must retain Form DE 8453-OL for three years.



DELAWARE Tax Forms and Instructions Information
Online Credit Card Payments
  • Offical Payments
    Or call 1-800-2PAY-TAX (Offical payments charges a nominal fee for this service)(Use Jurisdiction Code 2000 for Individual and Jurisdiction Code 2006 for Business Taxes)
Mailing Addresses
  • Return Mailing Address:
    State of Delaware Division of Revenue
    PO Box 8765
    Wilmington DE 19899-8765

  • Return Mailing Address without Refund:
    State of Delaware Division of Revenue
    PO Box 508
    Wilmington DE 19899-0508

  • Estimates Mailing Address:
    State of Delaware Division of Revenue
    PO Box 8735
    Wilmington DE 19899-8735

  • Amended Return Mailing Address:
    Delaware Division of Revenue
    PO Box 8765
    Wilmington DE 19899-8765

  • Extension Mailing Address:


    State of Delaware Division of Revenue
    PO Box 508
    Wilmington DE 19899-0508

  • Electronic Filing:
    The Delaware e-file program: ? Supports federal/state (piggyback) filing and state-only filing through the Federal/State Electronic Filing Program (Modernized e-File System). ? Allows electronic filing of part-year and nonresident returns. Exclusions from electronic filing. Delaware does not accept: ? Amended, tax years prior to 2014, or non-calendar year returns. ? Returns reporting a Delaware lump-sum distribution. ? Returns on which the number of exemptions claimed on the state return does not match the number of exemptions claimed on the federal return. The only exception to this rule is additional exemptions for a taxpayer and/or spouse age 60 or over.
Federal Tax Information