ON the one hand, ALL homes come with "back taxes" since the tax bill that we pay in Chicago/Cooko County is actually the tax bill for last year. In most cases, the seller will credit you enough at closing to pay their fair share of the taxes that are due the year after you buy.
However, there are some instances where the last tax bill (or two) have not yet been paid by the current seller. In this case, these taxes will need to be paid (or, in the case of SERIOUSLY delinquent "back taxes", a trip to the County Building may be in store to get a "certificate of redemption".
IN any event, these are things that your attorney can answer for you during the Attorney Review period.
If you'd like a referral for an attorney, or I may be of further assitance in securing a home loan for you, you can contact me at 773-416-7107.
Senior Mortgage Consultant