This question already has an answer here:
I got my B2 visa 20 years ago and I overstayed for about four years and I worked illegally.
I have a plan to go on a business trip to Las Vegas. I'm not sure what to say to the official if I'm asked if I worked back then. I paid taxes to the IRS and had an SSN, It was not legal to work but I used that number then.
Never got a ticket or trouble there.