There was bad news Tuesday for a Baton Rouge woman serving nearly eight years in federal prison for her admitted participation in a scheme that defrauded the Internal Revenue Service of nearly $1 million.

U.S. District Judge Frank J. Polozola revoked a three-year term of post-prison supervision imposed on Clarissa T. Ayo, 35, after she completed an 18-month prison term in an unrelated criminal case. Polozola then sentenced Ayo to an additional 20 months in federal prison.

And Polozola stacked that 20 months on top of a 94-month prison term that U.S. District Judge James J. Brady imposed on Ayo in April for her participation in the tax scam.

In that tax-fraud case, Ayo admitted that she participated in the filing of 42 false income tax returns that claimed $136,076 in bogus refunds.

But agents of IRS-Criminal Investigation, the Secret Service, Social Security Administration, U.S. Probation Office and Assistant U.S. Attorney Richard L. Bourgeois Jr. later determined Ayo and two other Baton Rouge women caused the IRS to lose $930,737.

More than 1,000 false tax returns had been filed.

One of the other women, 40-year-old Sheila M. Cage, was sentenced this year to a prison term of 57 months.

Levonne Stewart, 42, was sent to prison for four years.

In April 2008, Ayo received her first federal prison term — 18 months — after admitting she conspired to defraud the government of $6,163. That was the amount of a federal check that mistakenly had been sent to a Southern University student at a wrong address.

Ayo admitted that she posed as the student to cash the check.

While under post-prison supervision in July 2010, Ayo was issued a 19th Judicial District Court summons after Baton Rouge police officers discovered video at JCPenney in Cortana Mall. That video showed Ayo stealing merchandise, according to federal court records filed by the U.S. Probation Office.

“Ms. Ayo admitted she had changed her clothing and admitted she was wearing a stolen dress,” Cassandra L. Robbins, a federal probation officer, said in a written recommendation for revocation of Ayo’s release from prison.

Less than three months later, Robbins wrote, Polozola, Ayo and two other people were discovered by deputies of the East Baton Rouge Parish Sheriff’s Office in possession of $189 in merchandise stolen from Dillard’s.