 Call 800-685-5688. 800-685-5688. 800-685-5688. Optima Tax Relief. Some restrictions apply. For complete details, please visit OptimaTaxRelief.com. Kick off the school year in style at CPS's Back to School Fest on Saturday, August 3rd at Washington Park. Join Cincinnati Public Schools for a day of fun, food, and friends. There will be giveaways with free backpacks, school supplies, and more. CPS will have resources on site for families.