This is not legal advice nor intended to create an attorney-client relationship. The information provided here is informational in nature only. This attorney may not be licensed in the jurisdiction which you have a question about so the answer could be only general in nature.
The IRS will absolutely know what social security income you have received.
Each January you will receive a Social Security Benefit Statement (Form SSA-1099) showing the amount of benefits you received in the previous year. You can use this Benefit Statement when you complete your federal income tax return to find out if your benefits are subject to tax.
This answer is based on general legal principles only and is not intended to provide specific legal advice. This answer is for informational purposes only and does not constitute the formation of a lawyer-client relationship. Any reader of this answer should not make decisions based upon in without first directly consulting with an attorney
YES. if this question is hypothetical you have the answer. If the question involves a real concern seek the advice of an experienced tax defense lawyer ASAP.
Of course, every answer or response is based on the information provided in the question asked and requires a much more complete context than is available in this public forum. This answer/response should NOT be relied upon to make any legal decisions.
Seek the advice of an experienced Federal and/or state criminal defense attorney in your jurisdiction BEFORE you say or do anything.