Sep 8, 2025 · Download small business and self-employed forms and publications, or call 800-829-3676 to order forms and publications through the mail.

Business owners, and/or their legal representatives, may apply for City of Chicago business licenses, renew business licenses, file tax returns, and make tax payments online.

Illinois Department of Revenue returns, schedules, and registration and related forms and instructions. These documents are in Adobe Acrobat Portable Document Format (PDF).

Apr 14, 2025 · This guide breaks down the most common tax forms small businesses need to know, including filing requirements and IRS due dates. See which ones apply to your company and get tips …

Please use this form only if you are a corporation, partnership or LLC registering for a Chicago business tax and you are not required to obtain a Chicago business license.

Sep 8, 2025 · There are electronic filing options available for many of the taxes and forms that small businesses are required to file, such as excise and employment taxes, Forms 1120, 7004, 1041 and …

MyTax Illinois is a centralized location on our website where taxpayers may register a new business or electronically file tax returns, make payments, and manage their tax accounts.

Information about Schedule C (Form 1040), Profit or Loss from Business, used to report income or loss from a business operated or profession practiced as a sole proprietor; includes recent updates, …

How Do I Register? What are my Rights?

Dec 6, 2025 · The form you use depends on how your business is organized. Refer to Business structures to find out which returns you must file based on the business entity established.