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Indiana Department of Revenue

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DOR > Business Tax Business Tax



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Welcome to the Indiana Department of Revenue’s tax site for businesses.

Administrative Protest Guidelines -- When a taxpayer receives a proposed assessment for additional tax or has been denied a request for refund, the taxpayer may be entitled to file a protest with the department. To learn more, click here.

Guide for Requesting Policy Determination -- A taxpayer who wants written guidance from the department may submit a request for policy determination with the Tax Policy Division. To learn more, click here

County Rates Available Online -- Indiana county resident and nonresident income tax rates are available via Department Notice #1.

New for Businesses -- The department is excited to introduce a new publication called BizTax, which will help businesses better understand Indiana tax laws, the tax-filing process, and services DOR offers. To read the latest issue, click here.

ATTENTION -- Effective Jan. 1, 2013, ALL businesses in Indiana must file and pay their sales and withholding taxes electronically. For more information, click here.

If you work in or have business income from Indiana, you'll likely need to file a tax return with us. Whether you're a large multinational company, a small business owner, or a self-employed individual, this site contains all the resources you'll need to properly file your return. You'll find information on how to register or close your business, make changes to your account, and file and pay your taxes online. You'll also find answers to frequently asked questions, as well as all the business tax forms and publications you might need.

If you are operating a convenience store or plan to sell bath salts, spice, or synthetic drugs, click here.

Business Tax Basics


Electronic Services