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  1. Does Idaho State accept the federal extension for C Corporations?
  2. When should I file my Idaho State Corporation Tax Return?
  3. When are the Idaho "C" corporation estimated income tax payments due?
  4. Where do I mail my Idaho Corporation Tax Return?
  5. Which Form should be used to file an Idaho State Corporation Tax Return
  6. How many Corporation Income Tax Rates does Idaho State have for Tax Year 2008?