More than 738,000 state returns (13 percent of the total) were filed after deadline, which puts people at risk of financial penalties.
Taxpayer who file late and do not pay what they owe can incur a penalty that is the greater of 35 percent of the tax due or $500, said Gary Gudmundson, communications director for the Ohio Department of Taxation.
Through April 5, the state had 3.83 million income tax returns filed. More than 88 percent of Ohioans file electronically, the state said.
In addition to state and federal taxes, many people have to file local income tax returns as well.
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