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If you are a registered business in the State of Delaware and would like to register to use the Delaware Taxpayer Online Portal, you must accept the Usage Terms below and set up a new User Profile. After completing the registration of your portal account, you will receive an email with a temporary password and sign in instructions. When signing in for the first time, you will need to set up Security Questions which you will need if you ever forget your password. To complete the registration process and view your authorized accounts, you will need to know your FEIN or SSN and have your Portal Identification Number (PIN), which you should have received in a letter from the Division of Revenue. If you have not received your PIN, please contact us.