CP268 tells you we made changes to your return because we believe there is a miscalculation on your return. You can get in-person help at your local IRS Taxpayer Assistance Center.Call for an appointment after you find a Taxpayer Assistance Center near you. A business may request a refund due to overpayment of tax. The overpayment may be the result of an amended return, audit or more money paid than was owed. Locate the closest Taxpayer Assistance Center to you. If you were overpaid, you will receive a written notice in the mail. Call the local IRS office to schedule an appointment. Bronx. Get your refund status. This notice tells you that all or part of the overpayment on a return you filed was applied to other federal taxes you owe.