From the Indianapolis Business Journal:
Answers on how Indiana lost track of $526 million in taxes will likely take months.
Representatives of the accounting firm Deloitte told budget leaders their assessment of what needs to be audited could last through August. The audit itself could take months longer after that.
Gov. Mitch Daniels announced last December that the state lost track of $320 million in corporate tax collections. State Budget Director Adam Horst then announced in April the state owed $206 million to Indiana's counties. Three top Indiana revenue officials resigned following the revelations.
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http://www.ibj.com/audit-of--526m-in-state-tax-errors-could-take-months/PARAMS/article/35716