Sorry to be so curt with you, Mark, but it's in your own best interest to do a little research

before posting...and it's really not that hard. All you have to do is conjure up a question, like "How do Undocumented Immigrants get jobs and pay Federal Taxes?"...then plug it into your browser...you'll get several responses, and I've linked one of them which goes into great detail.

Link: https://bipartisanpolicy.org/blog/how-do-undocumented-immigrants-pay-federal-taxes-an-explainer/