If you still haven’t completed your 2015 state income taxes, today is the filing deadline. If you're late filing, be prepared to pay a penalty of an extra ten-percent on top of whatever you owe.
"I will say that typically there is a very slight grace period," says Victoria Daniels of the Iowa Department of Revenue, "but I encourage people strongly to get their returns in and file them electronically and make their payments no later than 11:59 pm."
If you don’t have enough money to pay your entire tax bill, Daniels says you should attempt to pay at least 90-percent of what is owed. As long you meet the 90-percent threshold, you can avoid a penalty and pay the rest later with interest.