Illinois of reg 2026

1. Click ‘Get Form’ to open the Illinois REG-3-C in the editor.
2. Begin by identifying your current business. Fill in your FEIN or SSN, business name, address, city, state, ZIP code, and telephone number.
3. If applicable, indicate if you have discontinued or sold your business. Note the effective date of this change.
4. To change your business name, provide both the previous and new legal names along with any DBA names.
5. Update your current address by filling in the legal and mailing addresses along with effective dates and affected taxes.
6. If adding a location, complete Schedule REG-1-L for additional site information.
7. For closing a location, specify the address and closure date. Attach additional sheets if necessary.
8. Update owner or officer information by providing names, titles, social security numbers, and ownership percentages.
9. To remove owners or officers from records, fill in their details including cessation dates.
10. Identify a contact person for your business by providing their name, title, and contact information.
11. Use the comments section for any additional notes relevant to your registration update.
12. Finally, sign and date the form to certify that all provided information is accurate.

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