You can find the CP or LTR number on the right corner of the letter. To correct your return, you must give us your daughter's correct name, social security number, and date of birth.Fill out the correct form for your business. First read the letter in its entirety. Fill out the "Reply to FTB" form included with your notice. Many find the easiest way to figure the entries for Form. X is to first make the changes in the margin of the return they are amending. Use this sample letter to dispute incorrect or inaccurate information that a business supplied to credit bureaus. Below are various CP2000 response letter samples that we have submitted to the IRS Automated Underreporter (AUR) Unit. Learn how to write a letter to the IRS with our comprehensive guide and sample.