To correct your return, you must give us your daughter's correct name, social security number, and date of birth. Use the format in the sample letter below.Make the letter brief and to the point. Learn how to write a letter to the IRS with our comprehensive guide and sample. Includes ChatGPT prompt. If a letter is about a changed or corrected tax return, the taxpayer should review the information and compare it with the original return. Sending an IRS audit reconsideration request? You can find the CP or LTR number on the right corner of the letter. The primary letter we use to request information about a return is Form DTF948 or DTF948O, Request for Information (RFI). If you made a mistake in entering a social security number, a payer's identification number, omitted a form, or misspelled a name, you can correct these errors.