I looked up the numbers a while back but this 2017 study says at least 50%, meaning the majority pay taxes.

https://itep.org/undocumented-immigrants-state-local-tax-contributions-2017/

Also, note that only 59.9% of households pay taxes, which means legal status isn't that important in terms of whether people pay taxes or not. They also won't likely get any social security money either.