Tax forms can be downloaded by selecting the specific tax year from the navigation bar on the left side on this page.  In addition, Cincinnati tax forms are available at all branches of the Hamilton County Public Library, the Information Desk located inside Cincinnati City Hall, or our office at 805 Central Avenue, Suite 600, Cincinnati, Ohio.  Please call (513) 352-3827 if you need to have tax forms mailed to you.   

          All payment coupons should be mailed to the following address:   

                                   Cincinnati Income Tax Division   
                                   P.O. Box 634580   
                                   Cincinnati OH  45263-4580

• The due date for filing your annual Cincinnati Income Tax Return is April 15th or the 15th day of the fourth month following the end of each taxable year.
  
  
• Requests for an extension of time to file your annual return must be submitted in writing prior to the due date of the tax return.
  
  
• Quarterly estimated tax payments for individuals are due by April 15th, July 31st, October 31st, and January 31st.  Business quarterly estimated tax payments are due by the 15th day of the 4th, 6th, 9th, and 12th months after the beginning of the taxable year. 
  
  
• Withholding tax payments are due by the 15th day of the following month for all employers who are required to make monthly payments.
  
  
• Quarterly withholding tax payments are due by the last day of the following month for all employers who remit their withholding payments on a quarterly basis.