Connecticut CERT-100 Sales Tax Exemption Certificate
The CERT-100 form is a Sales Tax Exemption Certificate for Connecticut, allowing purchasers to claim tax exemption on specific materials, tools, and fuel. This form should be used by businesses that use these purchases directly in industrial manufacturing or utility services. Properly completing and following the guidelines for the CERT-100 protects against unnecessary taxation.
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How do I fill this out?
To fill out the CERT-100 form, you should begin by providing all required details about your business, including tax registration numbers. Next, specify the items being purchased and indicate whether this is a blanket certificate or for one-time use only. Finally, ensure the form is signed by someone authorized within your organization.

How to fill out the Connecticut CERT-100 Sales Tax Exemption Certificate?
1
Provide your business details and tax registration number.
2
Specify the items being purchased along with descriptions.
3
Choose between blanket certificate or one-time use.
4
Sign the form with an authorized signature.
5
Retain a copy of the certificate for your records.
Who needs the Connecticut CERT-100 Sales Tax Exemption Certificate?
1
Manufacturers who purchase materials for production.
2
Utility providers needing to exempt fuel for service delivery.
3
Wholesalers selling goods to manufacturers in Connecticut.
4
Contractors using tools and materials for projects.
5
Any business entity needing sales tax exemption for specific purchases.
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What are the instructions for submitting this form?
To submit the CERT-100 form, ensure all fields are properly filled and signed. Send the completed form either physically to the seller or electronically via fax or email if permitted. Review the specific submission instructions provided by the vendor for any additional compliance requirements.
What are the important dates for this form in 2024 and 2025?
Review any relevant deadlines for tax submissions and changes in regulations in 2024 and 2025 to ensure compliance. Staying updated on significant tax-related dates is crucial for businesses. Note that legislative changes may also affect the use of the CERT-100 form.

What is the purpose of this form?
The primary purpose of the CERT-100 form is to enable businesses and individuals in Connecticut to claim exemptions from sales and use taxes on specific purchases. This form supports economic activity by reducing the tax burden on essential materials, tools, and fuel necessary for manufacturing and utility provision. By adhering to the guidelines provided in the CERT-100, purchasers can ensure compliance with state tax laws while effectively managing operational costs.

Tell me about this form and its components and fields line-by-line.

- 1. Name of Purchaser: Enter the name of the business or individual making the purchase.
- 2. Address: Provide the full business address.
- 3. CT Tax Registration Number: Enter the Connecticut tax registration number, if available.
- 4. Federal Employer ID #: Include the Federal Employer Identification Number for tax identity.
- 5. Name of Seller: Indicate the name of the vendor or seller.
- 6. Check One Box: Select either 'Blanket Certificate' or 'Certificate for One Purchase Only'.
What happens if I fail to submit this form?
Failing to submit the CERT-100 form can result in taxation on exempt purchases, which can significantly impact your business's bottom line. Furthermore, improper use of the form may lead to legal consequences, including hefty fines.
- Tax Liability: Unsubmitted forms may lead to unexpected sales tax liabilities on exempt items.
- Legal Penalties: Using the form incorrectly can incur penalties from tax authorities.
How do I know when to use this form?

- 1. Manufacturing Purchases: Utilize the form when buying items for the manufacturing of goods.
- 2. Utility Services: Essential for companies purchasing fuel or resources to deliver utilities.
Frequently Asked Questions
What is the CERT-100 form used for?
The CERT-100 form is used for claiming a sales tax exemption on specific purchases of materials, tools, and fuel in Connecticut.
How do I fill out the CERT-100?
You need to provide business details, item descriptions, select the type of certificate, and sign the form.
Who should use the CERT-100 form?
Manufacturers, utility providers, and contractors can use this form for tax exemption on qualifying purchases.
Can I edit the CERT-100 PDF?
Yes, you can edit the CERT-100 PDF using our online editor on PrintFriendly.
How do I submit the completed CERT-100 form?
Once completed, you can print and submit the form to the seller or relevant authorities.
Is there a specific retention policy for the CERT-100?
Yes, keep a copy of the CERT-100 for at least six years from the date it is issued.
What happens if I submit incorrect information on the CERT-100?
Providing false information may lead to penalties, including fines or imprisonment.
Can I share the CERT-100 form with others?
Yes, you can easily share the completed form using our sharing options on PrintFriendly.
What are the important dates for submitting the CERT-100?
Important dates vary, but it's advisable to check state regulations annually.
Is the CERT-100 form the same for all states?
No, the CERT-100 form is specific to Connecticut and includes regulations under state law.
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