A D.C. tax preparer pleaded guilty Wednesday to charges that she was part of a conspiracy that led to the filing of more than 3,000 fraudulent returns and more than $14 million in refunds, authorities said.

Ladonna Davis, 28, pleaded guilty to charges of conspiracy and first-degree theft in the District’s federal court, according to a press release from the U.S. Attorney’s office.

Between 2006 and this year, Davis and others filed more than 3,000 fraudulent federal income tax returns and more than 600 fraudulent D.C. returns, as well as others in Maryland in Virginia, authorities said.

Davis and the others charged fees to prepare the returns, authorities said, asking more from those with larger returns.

Sentencing has not been scheduled. Davis could face as much as 71 months in prison and a fine of up to $100,000.