To claim a refund, you must file an income tax return for the year stated on the letter. CP268 tells you we made changes to your return because we believe there is a miscalculation on your return.The owner of the vehicle can request a refund or credit writing a letter. For ACTIVE faculty, staff and students for an overpayment in the Current Calendar Year. Did the IRS change your tax return check amount? Here's everything you need to know about responding to an adjusted refund letter. Please note that overpayments and credits are automatically applied to unpaid taxes. After completing this lesson, you will determine if taxpayers have overpaid (a refund is due) or have underpaid (balance is due to the government) their tax. Edit, sign, and share sample email of refund money to customer online. No need to install software, just go to DocHub, and sign up instantly and for free.