I understand that IA's pay some sales taxes; although food, medicine etc. are not taxed in some states. Of course, beer, boots and blue jeans are.

But other than sales taxes, what taxes (social security?) do they pay??

Some of them have withholding taken out of their paychecks that they get through
either using forged government ID or ss numbers gained through identity theft

There have been many people that found out that they were the victims of identity theft
when they got their earnings statements from all the jobs the illegals worked with their number
when an illegal steals a ss number it is typically passed around to at least 20 other illegals

But, I'm sure the irs is REAL understanding about mistakes of this nature(just kidding)
they want the American Taxpayer that had their identity stolen to pay the taxes that the
illegals incurred by using the ss number that they obtained through identity theft