Connecticut: 3rd-Party Setup

Enter Required Information

• Log in to myconneCT

• Locate your Sales & Use tax account on the Summary tab

• Enter the listed Filing Frequency on the Return tile within your Sales & Use tax account tile on the Summary tab

• One of the following validation methods is required:

  • Sales TAx Account ID: Enter the 10-digit “Account ID” listed on the Account tile (format: 1234567890)

    • Note: This is different than the 12-digit “CT Registration No”. Please be sure to provide the 10-digit Account ID. 

  • Recent Tax Payment:

    • From the home page in your myconneCT account, click the More… menu tab

    • Click Manage Payments & Returns

    • Select Sales & Use from the Accounts dropdown

    • Select Payments and Posted from the two Show dropdowns

    • Then copy the exact amount for the most recently submitted payment 

  • Letter ID: Provide a Letter ID from a physical letter you have received from Connecticut (format: L1234567890)

    • Letter IDs are located in the header of official correspondence from the Connecticut Department of Revenue. The ID begins with an "L" followed by a 10-digit number.

• Effective Registration Date (Required for First Return Filing only)

  • Your effective registration date can be found in the mailed registration confirmation documents for your Sales & Use tax account.

    • Tip: it will fall within the period covered by our first return available in the myconneCT account. 

  • If you do not have a letter containing your Effective Registraton Date, you can message the Connecticut DRS online to request it.

    • From the home page in your myconneCT account, click the More… menu tab

    • Click Send a Message in the Correspondence section

    • Click your Sales & Use tax account

    • Click the first (oldest) return period

    • Click Other

    • Template Subject:  “Effective Date of Registration Confirmation”

    • Template Message: “Can you please confirm the effective registration date for this sales and use tax account?”

    • *Note: then regularly login to check for a response message.

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