The amount of money that illegal immigrants pay in taxes in the US depends on the income they make and how much they are taxed.
Though illegal immigrants usually pay near the same amount or even the same amount of income taxes as legal USA residents.
The total amount of income taxes that illegal immigrants pay in taxes in the USA is around $27 billion dollars per year and in 10 years the income tax amount that illegal immigrants pay in taxes is $196 billion dollars.
So as long as the USA illegal immigrant reports their income taxes properly and pays the taxes they pay near the same amount or even the same percentage of their income that USA residents do.