Illinois LLC Resource Hub

Form an LLC in Illinois

Step-by-step formation walkthrough

Illinois LLC cost breakdown

Total 1st-year and ongoing costs

EIN application for Illinois LLCs

Federal tax ID setup

Illinois registered agent

Requirements + recommended services

Illinois operating agreement template

Free template + state defaults

Illinois LLC naming rules

Designators + forbidden words

Single-member LLC in Illinois

SMLLC-specific guidance

Multi-member LLC in Illinois

Partnership default + OA essentials

Add a member to a Illinois LLC

Admission process + tax implications

Change LLC name in Illinois

Amendment filing process

Illinois LLC tax structure

SMLLC / Partnership / S-Corp / C-Corp

Convert Illinois LLC to S-Corp

Form 2553 walkthrough

Illinois franchise tax guide

Rates + due dates

Illinois sales tax for LLCs

Rate + nexus thresholds

Illinois tax deadline calendar

Federal + state deadlines

Illinois annual report

Deadlines + fees + process

Illinois business license

State + local licensing

Foreign LLC in Illinois

Out-of-state registration

Illinois DBA registration

Fictitious name filing

Dissolve an LLC in Illinois

Wind-up process + final filings