Users can still submit their federal income tax returns.(AP Photo/Paul Sakuma) 5, 2015, will be transmitted as soon as possible. Intuit, the company behind the popular tax preparation software, says state tax returns already filed since Thursday, Feb. TurboTax says it has temporarily stopped processing state tax returns due to an increase in fraudulent fillings. 24, 2013 file photo, a customer looks at a copy of TurboTax on sale at Costco in.