Indiana Sales Tax Exemption Certificate ST-105
The Indiana Form ST-105 is a Sales Tax Exemption Certificate used by registered retail merchants and businesses outside Indiana. It allows for tax-exempt purchases when completed correctly. This document is essential for proper filing to avoid unnecessary sales tax payments.
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How do I fill this out?
Filling out the Form ST-105 requires specific information to be valid. Each section must be carefully completed to ensure sales tax exemption. It’s important to follow the instructions for providing the necessary identification numbers and exemption details.

How to fill out the Indiana Sales Tax Exemption Certificate ST-105?
1
Provide your Indiana Registered Retail Merchant's Certificate number.
2
Indicate whether it is a blanket or single purchase exemption.
3
Describe the items to be purchased under exemption.
4
Certify the use of the exemption for allowable purposes.
5
Sign and date the form, including printed name and title.
Who needs the Indiana Sales Tax Exemption Certificate ST-105?
1
Retail merchants in Indiana seeking to avoid sales tax on exempt purchases.
2
Businesses located outside Indiana wishing to purchase tax-exempt goods.
3
Nonprofit organizations that qualify for tax exemption to save on purchases.
4
Farmers directly involved in selling agricultural products requiring exemptions.
5
Government agencies purchasing goods or services exempt from sales tax.
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What are the instructions for submitting this form?
To submit Form ST-105, fill out all sections accurately, ensuring all required identification numbers are included. You can send the completed form to the Indiana Department of Revenue via mail at the address specified on the form or submit it online through the Department's designated portal. It is recommended to retain a copy of the submitted form for your records.
What are the important dates for this form in 2024 and 2025?
Important dates for the Form ST-105 include annual updates aligned with the Indiana tax calendar. Businesses should check for any changes in exemptions or submission guidelines regularly. Ensure the form is completed and submitted during the appropriate sales tax periods.

What is the purpose of this form?
The purpose of Form ST-105 is to provide a mechanism for Indiana purchasers to claim a sales tax exemption. By utilizing this form, eligible buyers ensure compliance with Indiana tax laws while making necessary purchases without incurring sales tax charges. This certificate is crucial for businesses, nonprofits, and other entities that frequently engage in tax-exempt transactions.

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

- 1. Purchaser Information: Includes name, business address, and identification numbers.
- 2. Exemption Type: Specifies whether the exemption is for single or blanket purchases.
- 3. Description of Items: Details the items being purchased which qualify for exemption.
- 4. Certification: A certification statement confirming the purpose of the exemption.
What happens if I fail to submit this form?
Failure to submit Form ST-105 properly can result in the collection of sales tax on purchases made. Without a valid exemption certificate, sellers are obliged to collect the appropriate sales tax. Therefore, it is crucial to ensure all information is accurate and complete before submission.
- Invalid Exemption: Purchasers may be charged sales tax if the form is incomplete.
- Penalties: Misuse of the exemption certificate can lead to legal penalties.
- Delayed Purchases: Incomplete forms can slow down the purchasing process.
How do I know when to use this form?

- 1. Retail Purchases: For exempt retail purchases, especially by registered merchants.
- 2. Nonprofit Transactions: Used by nonprofits to avoid sales tax on qualifying goods.
- 3. Government Purchases: For tax-exempt purchases made by government agencies.
Frequently Asked Questions
How do I obtain Form ST-105?
You can easily access Form ST-105 online through the Indiana Department of Revenue's website.
What information is required to fill out this form?
You need to provide your identification number, type of exemption, and description of items purchased.
Can out-of-state purchasers use this form?
Yes, out-of-state purchasers can use this form if they provide necessary registration details from their state.
What happens if I forget to sign the form?
If the form is not signed, it will be deemed invalid and sales tax may be charged.
How can I edit the PDF once downloaded?
You can use PrintFriendly's editing tools to make changes directly to the PDF before saving it.
Is there a fee to use the form?
There is no fee to fill out Form ST-105; however, tax regulations must be adhered to.
Who is eligible for sales tax exemption?
Retailers, nonprofits, farmers, and government entities are typically eligible.
Can I save my changes to the PDF?
Yes, after editing, you can download the PDF with all changes saved.
What if I provide incorrect information?
Providing incorrect information can invalidate the exemption, resulting in a potential tax charge.
How do I submit the completed form?
You can submit the completed form via mail or online depending on your purchasing process.