Privacy and disclosure laws prohibit us from sharing information, whether or not we take action. You can report a person or company to us if you believe they are not complying with tax laws. When sending receipts, include your reference number at the top of the first page. Tax evasion is a deliberate under-reporting or non-reporting of income. To provide additional information or correct previous information, submit another report. You can report anonymously, but it helps us if you identify yourself.