Missouri State Auditor Nicole Galloway issued a subpoena Wednesday to the Department of Revenue after it refused to provide records for a state audit.
Galloway is auditing the department's compliance with state law that requires it to issue tax refunds within 45 days. Galloway asked for the records six weeks ago, but the department has not provided the information, according to a news release.
Refunds issued after 45 days have to be paid with interest.
"If the new administration intends to operate behind a wall of secrecy, I will use the full authority of my office to ensure transparency and accountability when taxpayer dollars are involved," Galloway said in the release.
The department has provided the information in previous years, according to the release, but has not provided information to Galloway regarding the number of people waiting on refunds or whether refunds have exceeded the 45-day period.
House Minority Leader Gail McCann Beatty, D-Kansas City, issued a statement Wednesday on behalf of House Democrats in support of Galloway's subpoena.
"If the revenue department is violating the law, Missourians need to know about it," Beatty said in the release. "House Democrats wholeheartedly support State Auditor Galloway’s efforts to hold the Greitens administration accountable and ensure that it doesn’t delay Missourians’ tax refunds for a minute longer than necessary."