Usually 50 to 75% illegal immigrants pay taxes. But hard to calculate since no way to count the total of undocumented immigrants. Big companies that produce goods love illegal immigrants and have been known to help them break the law. This is because illegal immigrants lower wages and increase production. Most illegal immigrants want to work and are willing to work for less than an American citizen. This competition depressed wages and can offset the countries technological development which reduces competition in the international market. Now. Depending on what money is made with illegal immigrants and how they use it is hard to follow. A good percentage is sent back to their extended family which reduces the circulating cash back into the local market in which they work in.

Now the congressional budget office reported that the tax revenues from unauthorized immigrants generate for state or local governments do not offset the total cost of services provided to them. https://www.pewresearch.org/fact-tank/2019/06/12/5-facts-about-illegal-immigration-in-the-u-s/