What this notice is about We're verifying your income, income tax withholding, tax credits and/or business income. If you filed a return You don't need to take any action. Please do not call us until 60 days after the notice date and only if you haven't received your refund or heard from us by then. If you didn't file a return Someone else may have used your personal information to file this return. Please complete and sign Form 14039, Identity Theft AffidavitPDF, and mail it to us along with the requested documents. You can find this form online at www.irs.gov. You can also refer to the IRS Identity Theft resource page for more information. Frequently asked questions Why is my return being reviewed? We select some returns to examine so we can determine whether income, expenses, and credits are reported correctly. This doesn't mean you made an error or were dishonest. Helpful information The IRS Identity Protection PIN can help prevent misuse of your taxpayer identification number on fraudulent federal income tax returns. Learn more at IRS.gov/ippin. Publication 3498-A, The Examination ProcessPDF Reference Tools Publication 1, Your Rights as a Taxpayer About Publication 17, Your Federal Income Tax Full list of tax forms and instructions Cần Trợ Giúp? Quý vị có thể ủy quyền cho ai đó (tiếng Anh) thay mặt quý vị liên lạc với IRS. Xem liệu quý vị có đủ điều kiện để nhận được sự trợ giúp từ Trung Tâm Cho Người Đóng Thuế Có Thu Nhập Thấp (tiếng Anh). Nếu quý vị không thể tìm thấy những gì quý vị cần trực tuyến, hãy gọi cho IRS theo số ở đầu thông báo hoặc thư gửi cho quý vị.