Directions to Ohio 529, CollegeAdvantage Directions to Ohio 529, CollegeAdvantage Search | Advanced Search | New Members | Coupons and Discounts | All Categories Government & Education >> Government Support - Executive, Legislative & Other Ohio 529, CollegeAdvantage 35 East Chestnut Street, 8th FloorColumbus, OH 43215 | map (614) 728-2859 | fax: (614) 644-5099 Visit Site Get directions to: Ohio 529, CollegeAdvantage fka The Ohio Tuition Trust Authority, 35 East Chestnut Street, 8th Floor, Columbus OH Get directions from: Click to Print This Page Need to update your categories or expand your listing? Or want to learn how your business can become a part of the Chamber? Contact us at membership@columbus.org for assistance.