Many communities have, however, supplemented the basic code by requiring a minimum 30 door opening in most rooms, 24 for bathrooms, at least one 36 exterior door, and a minimum door height of 6'-8 (80).
Illinois will automatically grant all taxpayers a six-month extension of time to file Form IL-1040. For calendar year filers, the filing date is automatically extended to October 15. You are not required to file Form IL-505-I in order to obtain this automatic extension.
The efile software helps you choose all the right state and federal forms, and you can prepare and efile as many state returns (resident, nonresident, or part-year resident) as you need for one price. Illinois Income Tax Filing Deadlines. The regular deadline to file an Illinois state income tax return is April 15.