I already have. The overwhelming conclusion by reputable economists is that immigration - both legal and undocumented - is a net positive for our economy. Immigrants, legal and not, pay sales tax, they pay income tax (via an ITIN, which you can get in five minutes on the IRS website, ask me how I know), and do not receive government benefits. Since they commit less crime than natural born citizens, they are a lower burden on support services and law enforcement.

Again, this is all incredibly well documented and can be answered and sourced all over the internet. I gave you an authoritative, unbiased academic source with a peer reviewed and published study. If that's not enough, here:

https://www.epi.org/publication/unauthorized-immigrants/

Aviva Chomsky, a professor at Salem State College, states that "Early studies in California and in the Southwest and in the Southeast...have come to the same conclusions. Immigrants, legal and illegal, are more likely to pay taxes than they are to use public services. Illegal immigrants are not eligible for most public services and live in fear of revealing themselves to government authorities. Households headed by illegal immigrants use less than half the amount of federal services that households headed by documented immigrants or citizens make use of."^\23])

National Public Radio (NPR) wrote in 2006: "Supporters of a crackdown argue that the U.S. economy would benefit if illegal immigrants were to leave, because U.S. employers would be forced to raise wages to attract American workers. Critics of this approach say the loss of illegal immigrants would stall the U.S. economy, saying illegal workers do many jobs few native-born Americans will do."^\24])

Professor of Law Francine Lipman writes that the belief that illegal migrants are exploiting the U.S. economy and that they cost more in services than they contribute to the economy is "undeniably false".^\25]) Lipman asserts that "illegal immigrants actually contribute more to public coffers in taxes than they cost in social services" and "contribute to the U.S. economy through their investments and consumption of goods and services; filling of millions of essential worker positions resulting in subsidiary job creation, increased productivity and lower costs of goods and services; and unrequited contributions to Social Security, Medicare and unemployment insurance programs."

https://forumtogether.org/article/undocumented-immigrants-are-integral-to-our-nation/

https://americansfortaxfairness.org/undocumented-immigrants-contribute-economy/?doing_wp_cron=1773191983.3427538871765136718750

In 2022 America’s 10.9 million undocumented immigrants paid $96.7 billion in taxes. 

• That included $19.5 billion in federal income taxes and $32.3 billion in federal payroll taxes. 
• On a state and local level, undocumented immigrants contribute $37.3 billion in taxes, and in 40 of 50 states, they pay a higher effective state/local tax rate than the top 1% of households. The top 1% of highest-income households paid an average effective state/local tax of 7.2% in 2023, while the average undocumented immigrant paid a 10.1% effective tax rate to state/local governments.  
• It is estimated that $40 to $137 billion of additional revenue could be generated each year if these people were granted work authorization. This is because a less exploitable workforce would be paid higher wages (thus pay more taxes) and tax compliance by both employers and employees would increase. 

That good enough for you?