A South Florida woman claiming to be a psychic pleaded guilty to tax evasion in federal court in Boston this week in a case involving an elderly Martha’s Vineyard woman who was reportedly bilked out of millions.

The Vineyard resident, who has not been named, paid the psychic more than $3.5 million for services — money that will now be returned — federal prosecutors said in a press release

Sally Ann Johnson, also known as Angela Johnson, Angelia Johnson, and Sally Reed, pleaded guilty Thursday to attempting to interfere with the administration of the IRS, according to a press release from acting Massachusetts District United States attorney William D. Weinreb.

Ms. Johnson, 41, owned and operated several business, including Flatiron Psychic, Psychic Match Inc., and Psychic Spiritual Salon Inc., which were billed as offering psychic readings, spiritual cleansing and strengthening, and meditation and hearings, the justice department said. From 2007 to 2014 the elderly woman living on the Vineyard paid more than $3.5 million to Ms. Johnson for “spiritual cleansing and healing services to rid the woman of demons through repeated exorcisms.”

The U.S. attorney said Ms. Johnson failed to report the income to the IRS and pay taxes on it, and took efforts to conceal it. This included using an alias and directing the woman to send payments to at least three different bank accounts. Ms. Johnson then withdrew large portions of the payments in cash. She also accrued substantial charges on a credit card held in the name of the woman, who ultimately paid the bills, the U.S. attorney said.

Ms. Johnson did not file a tax return or pay taxes on the income received and neither did any of the businesses she operated.

The defendant agreed to repay $3.56 million to the Vineyard woman as part of a plea agreement, and will also pay restitution to the IRS for taxes avoided from 2007 to 2014.

U.S. District Court judge Denise J. Caspar scheduled sentencing for Jan. 17.

According to the press release, Chilmark police assisted with the investigation.