We begin with people in the U.S. illegally who pay taxes. I'm David Brancaccio in Los Angeles.

More now on the government that's moved to give immigration officials access to IRS records.

The Trump administration wants to use tax info to find people under deportation orders or have committed crimes.

This blurring of a traditional boundary is

reportedly the reason one of the acting heads of the IRS quit the other day. Critics say sharing

IRS info like this is illegal and could cost the government tens of billions of dollars in

tax revenue if people see being in the tax system as a new liability. Marketplaces Nova Saffo has more.

For the last 15 years, Itzel Ramirez, who runs a tax preparation service in Milwaukee,

has hoped clients stay current with the IRS by filing with ITINs,

a special social security-like number the agency created for foreign nationals.

All the time I say, do your taxes, it's good for you.

The prevailing wisdom in immigrant communities has been that filing taxes can help

efforts to remain in the U.S., at minimum by showing proof of residency and responsible behavior.

But this tax season, Ramira says she's processed

about half as many filings as usual, hundreds less. This year, the people say, no, I don't want it

because maybe I already shared the information with ice or no, because for what I need to do, that the government sent us to Mexico or sent us to our country.

So they wait for these reasons.

Experts worry that the ICE IRS data sharing pact will lead to unintended consequences just like this.

And the costs to America's bottom line

could be steep. Natasha Serrin is with the Yale budget lab. Unauthorized immigrants pay about

$66 billion in federal income and payroll taxes and another about $30 billion in state taxes. If more undocumented immigrants

stop filing and begin working outside of the traditional payroll system, many use fake,

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