The Illinois Property Tax Appeals board ruled that the tax on Trump's Chicago skyscraper was overvalued in 2011.
As a result, the former US president should be returned $ 1 million, but Chicago officials are trying to prevent this, according to Business Insider.
It turned out that the Cook County authorities overestimated the cost of hotel rooms and retail space in the building, as a result of which Trump paid a higher tax.
In turn, the district attorney appealed the decision to return the businessman $ 1 million, since Trump's money will be owed from taxes on property owned by the Chicago authorities.
If the money is returned, Chicago public schools will lose about $ 540,000.
The state attorney's office said it could not comment on the upcoming trial.