ILLINOIS (RFD) — You can start filing taxes in Illinois today. The Federal Government may be shutdown but state and federal taxes will be accepted on January 28th. The Illinois Department of Revenue is ready to go and Terry Hortsman with Revenue says the best way to do it is by electronic means. Filing electronically will allow you to receive your return in the most secure and most prompt manner. If you need to verify your ID and receive a letter in the mail to do so you can do it online.