Employers should begin the withholding with your last payroll in June, which will be your first payroll paid after July 1st.
Please pay particular attention to the bold-ed language from Canton's Income Tax Code, below.
182.051 COLLECTION AT SOURCE; WITHHOLDING FROM QUALIFYING WAGES.
(A) (1) Each employer, agent of an employer, or other payer located or doing business in the Municipality shall withhold from each employee an amount equal to the qualifying wages of the employee earned by the employee in the Municipality multiplied by the applicable rate of the Municipality's income tax, except for qualifying wages for which withholding is not required under section 182.052 of this Chapter or division (D) or (F) of this section. An employer, agent of an employer, or other payer shall deduct and withhold the tax from qualifying wages on the date that the employer, agent, or other payer directly, indirectly, or constructively pays the qualifying wages to, or credits the qualifying wages to the benefit of, the employee.