Federal officials say Iowans are more likely than most to electronically file their income taxes. New figures show 46 percent of Iowans “e-filed” last year’s income tax returns — the highest percentage in any state. Don Cooper, acting director of the Iowa Department of Revenue and Finance, says those who “e-file” get their refunds much faster.Cooper says they hope to have 59 percent of Iowans file electronic tax returns this season.Cooper says there are benefits to his department and the taxpayer. The error rate is dramatically reduced by electronic filing, and his agency is hiring fewer people to wade through paper returns and send out refund checks.. Cooper says Iowans who e-file will get their refunds in two weeks or less. Those who file a paper return will have to wait at least 12 weeks.