Make a guess. If there are amounts in boxes 18 and 19, it would be rare for an employee not to know which city his employer is withholding income tax for.
It usually doesn't matter, as it's only used for the federal state and local tax deduction, which automatically transfers if there ia an amount in box 19 (regardless of what's in box 20).
Kansas City is the only MO city that TT can prepare a city return for.
