Business.gov - The Official Business Link to the U.S. Government
Business Income Taxes
When starting a business, you must decide what form of business entity to establish. Your form of business (i.e. sole proprietorship, partnership, LLC) determines which income tax return form you have to file. The federal government levies four basic types of business taxes: income tax, self-employment tax, taxes for employers, and excise taxes. To learn more about these taxes, visit the U.S. Internal Revenue Service's (IRS) Guide to Business Taxes.
Choose the form of your business below to find out which federal tax forms you need to file:
Get Tax Help
- Contact the IRS
Answers to tax questions - Taxpayer Advocate
Help resolving tax problems
Nearly every state levies a business or corporate income tax. Like federal taxes, your state tax requirement depends on the legal structure of your business. For example, if your business is an LLC, the LLC is taxed separate from the owners of the business, while sole proprietors report their personal and business income taxes using the same form used to report their business taxes. Consult the General Tax Information link on the State Tax Guide for specific requirements.
Additional Resources from the IRS:
- Changing Your Business Structure
Federal income tax and tax registration requirements if you change the form of your business.
