How can you report someone to the IRS?

To report someone to the IRS, you can use Form 3949-A, which is specifically designed for reporting suspected tax fraud or illegal activities. Provide as much detail as possible, including the individual's name, address, and the nature of the suspected violation. You can submit the form online or mail it to the IRS. Additionally, you can report tax fraud anonymously, but including your contact information may help the IRS follow up on the investigation.