Reporting tax credit fraud is a serious allegation to make against another person. The Internal Revenue Service has a form to report fraud, or a person can use a letter instead of the form. People reporting fraud are not required to report their names, but the Internal Revenue Service prefers to have names, which it will keep confidential.
Gather the information the Internal Revenue Service requires for reporting tax credit fraud. The main information required is the name and address of who you are reporting and his taxpayer identification number if you can find it and a description of the fraud with how you found out about the fraud, what years you believe are involved and an estimate of the amount of fraud. The IRS also wants but does not require your name, address and phone number.
Compile the information into a letter or into Form 3949-A, which can be found on the website in References.
Mail the letter or Form 3949-A to:
Internal Revenue Service
Fresno, CA 93888