More than $23 million of the tax refund overpayments Louisiana made in March have been recovered.
State revenue department spokesman Byron Henderson said Monday that the state has collected $23.4 million of the $26 million incorrectly sent to taxpayers last month.
Work continues to collect the remaining dollars.
Henderson says letters were sent to taxpayers who still owed money on April 15, telling them they have 30 days to pay the balance before they face interest and penalties.
More than 66,700 taxpayers were double-paid their state tax refunds in mid-March, in what state officials described as a computer processing error.
In most instances, officials say the double payment was made through bank account direct deposits and debit card allocations that were quickly reversed.