CP268 tells you we made changes to your return because we believe there is a miscalculation on your return. You can find the CP or LTR number on the right corner of the letter.The notice will provide the tax type from which the overpayment originated and tax type to which it is being applied. 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. Wage Tax refund requests must be submitted through the Philadelphia Tax Center. You don't need a username and password to submit a refund request. I am getting a letter from the IRS in Philadelphia. It's addressed to myself and my husband. Gov or call 1-800-TAX-FORM (1-800-829-3676).