HB 177 has moved the go live for transitioning Delaware DBA registration from courts to DOR. DBA registration will move to DOR starting February 2nd, 2026. More Info

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Prior Year Business Tax Forms


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Form 300 – Delaware Partnership Return
Instructions
Form 300, Schedule K-1 – Partners Share of Income
Form 1100 – Corporate Income Tax Return
Instructions
Form 1100S – Corporation Reconciliation And Shareholders Information Return
Instructions
5506CPE – Exemption from Public Utility Tax on Cell Phones

Form 300 – Delaware Partnership Return
Instructions
Form 300, Schedule K-1 – Partners Share of Income
Form 1100 – Corporate Income Tax Return
Instructions
Form 1100S – Corporation Reconciliation And Shareholders Information Return
Instructions
5506CPE – Exemption from Public Utility Tax on Cell Phones

Form 300 – Delaware Partnership Return
Instructions
Form 300, Schedule K-1 – Partners Share of Income
Form 1100 – Corporate Income Tax Return
Instructions
Form 1100S – Corporation Reconciliation And Shareholders Information Return
Instructions
Withholding Coupons
Corporate Tentative Coupons5506CPE – Exemption from Public Utility Tax on Cell Phones

Form 300 – Delaware Partnership Return

Instructions
Form 300, Schedule K-1 – Partners Share of Income
Form 1100 – Corporate Income Tax Return
Instructions

 Form 1100S – Corporation Reconciliation And Shareholders Information Return
Instructions
Withholding Coupons
Corporate Tentative Coupons
5506CPE – Exemption from Public Utility Tax on Cell Phones

General Forms

5506CPE – Exemption from Public Utility Tax on Cell Phones

General Forms
5506CPE – Exemption from Public Utility Tax on Cell Phones

General Forms
Gross Receipts Coupons
Withholding Coupons5506CPE – Exemption from Public Utility Tax on Cell Phones

Gross Receipts Coupons
Withholding Coupons5506CPE – Exemption from Public Utility Tax on Cell Phones



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