Reuters

Because the new federal tax law does not affect 2017 tax returns, some taxpayers took action late last year to maximize deductions of state and local taxes on property, sales and income before the new law caps them at $10,000.

In Illinois’ largest county, Cook, which includes Chicago, $757 million, or 11 percent of first installment property taxes, were prepaid, according to County Treasurer Maria Pappas.

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