What publication provides general information about Illinois Withholding Income Tax?

I need general information about Illinois income tax withholding. What publication will be helpful?

Please refer to the following publications:

• Publication 130, Who is Required to Withhold Illinois Income Tax.  
• Publication 131, Withholding Income Tax Filing and Payment Requirements.
• Publication 121, Illinois Income Tax Withholding for Household Employees, for household employers.
  

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