CP268 tells you we made changes to your return because we believe there is a miscalculation on your return. You get an overpayment credit when your tax payments exceed what you owe.You'll automatically receive a refund of the credit. 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. Locate the closest Taxpayer Assistance Center to you. You can find the CP or LTR number on the right corner of the letter. Select Respond to department notice from the expanded menu. If you did not fill out all of the application, you can finish it during your interview. The Welfare Tax Intercept Program is designed to assist counties in the collection of delinquent CalWORKs overpayments and CalFresh overissuances.