Ward County, N.D., owes the Internal Revenue Service (IRS) $80,000 in back payroll taxes for allowing employees to take home vehicles, an audit conclusion the county plans to challenge, the Minot Daily News reported.

The county auditor told the newspaper that the IRS is using an adjusted lease value on county-owned vehicles to determine how much tax should have been assessed on use of the vehicles as an employee fringe benefit. The calculation includes both take-home vehicles and those that remain on the county lot.

The county will need to produce additional documentation to challenge to decision.