keep getting a phone call from this number on a private unpublished cell phone. They leave no messages. don't know who it is or why they are calling.

This a law firm attempting to collect fines you've already paid.  They will wait until years after you've paid the fine and then demand a payment receipt you may have discarded or threaten a collection preceding.  They may not even have your correct name or address but will seek to verify both.  They are recording your call; tell them nothing.

claim to be a law firm representing the State of Kansas Dept of Revenue.  Any issues I had with them have been resolved many years ago.  I agree with the other poster that this outfit is probably fishing for info to make you think you have to pay them something.  Since they are from ILL, I would not be surprised if it's not something to do with oboma harassing a conservative (me)  I set this number up with a special ring tone ... which is 1 second of silence.  You can record your own if you can't find it on google.

I just got phone call from this number and said it's a law firm. A woman told me I have a balance amount more than $1000 on my 2012 tax payment. However, my total income in 2012 is less than $5000, how could it be? They have my last SSN number and my old address. Is this a data leak?

Called tonight claiming i still owe money from last years taxes that i filed PROPERLY! Asked for either a credit card or bank account #.