IRS

Updated 9:45 a.m. ET

The White House is banging the drums that President Trump is doing something big again ahead of his 100th day in office — unveiling a tax "plan."

"This is going to be the biggest tax cut and the largest tax reform in the history of our country," Trump's Treasury Secretary Steve Mnuchin said at a panel Wednesday morning.

The U.S. Department of Justice has charged 61 people and entities with conspiracy and fraud over a scam that involved phone calls from people pretending to be from the IRS or other government agencies.

The conspiracy defrauded at least 15,000 people of more than $300 million, the U.S. government says. The defendants — 56 people and five call center groups — were indicted last week, and the documents were unsealed on Thursday.

A Washington watchdog group filed a complaint Tuesday with the IRS about a secret-donor nonprofit organization that is spending millions of dollars on commercials to boost Marco Rubio's 2016 prospects.

Conservative Solutions Project has aired pro-Rubio TV ads in Iowa, New Hampshire and South Carolina, in addition to sending mail to voters in those early presidential primary states.

C. DiMattei

South Florida branches of the Internal Revenue Service are among the agency offices being affected by the current U.S. government shutdown.

And the situation is leaving some local taxpayers angry and frustrated.

Seventy-one-year old Alfonso Valencia of Sunrise said he was summoned by letter to the IRS' Plantation office several days ago to settle a real estate tax matter in person.  

When told that the office is closed until further notice, he took it in stride. Nevertheless, he stomped his foot down on the pavement -- hard.