File LLC and App. for Admission to do business

Do we need to file both Articles of Incorporation to do business in Illinois as an LLC as well as an Application for Admission to do business in Illinois?

Answer

No.

The Application for Admission to do business in Illinois is only for LLC's formed in other states that want to register to do business in Illinois.

If you are creating an LLC for the first time in Illinois, you want to file Illinois Articles of Organization.