The IRS announced on Monday night that income tax filing season would begin on Jan. 28 and that it would pay refunds to taxpayers, in spite of the government shutdown.
The agency said that it would recall a "significant portion" of its workforce, summoning them back to work without pay.
A spokesman for the IRS was unable to provide the specific details on how many IRS workers would be brought back and for which functions, as the agency has not yet released its updated contingency plan for the filing season.
The announcement from the IRS came after a Trump administration official told reporters on Monday that federal income tax refunds would be paid even though the government is shut down.
"Tax refunds will go out," said Russell T. Vought, acting director of the White House Office of Management and Budget, in a briefing on Monday.
There have been growing concerns that tax refunds might be delayed as 800,000 federal workers are either furloughed or working without pay as President Donald Trump and Congress are mired in a standoff over funding for a southern border wall.
Only about 12 percent of IRS staff is expected to continue working through a shutdown outside of filing season, according to the agency's plan, which means certain functions such as answering taxpayer questions would be curtailed.
"The processing of returns and customer service — most of those employees have been furloughed," said Nicole Kaeding, director of federal projects at the Tax Foundation.
"How will they bring those employees back, and will they be compensated while they're working?" she asked. "Those are some large questions that haven't been answered, even though they said refunds would be processed."
That makes this a stressful time for accountants — and their clients. "The October 2013 shutdown caused a lot of angst for practitioners," said Edward Karl, vice president of taxation at the American Institute of CPAs.
"If there were some issue and you needed to contact the IRS, you couldn't get them," Karl said. "There were many folks concerned about that."
Meanwhile, House Ways and Means Committee staff told The New York Times on Monday that they were struggling to get clarity from administration officials, many of whom are out on furlough.
"We keep trying to call people at IRS and Treasury," said Daniel Rubin, a spokesman for the Ways and Means Committee, "and there's no one there."