Iowans who are laboring over their state income tax forms in the next few weeks are being encouraged to remember the Corndog Tax Checkoff. Estee Walter, sponsorship director for the Blue Ribbon Foundation, says this is the tenth year for the checkoff, which benefits the Iowa State Fair.Walter says taxpayers can contribute as little as one-dollar to the checkoff. Whatever you donate will either be added to the amount you owe or it’ll be taken off of your refund.Money collected goes toward various improvement projects at the Iowa State Fair, like the new roof on the livestock pavilion, the campground safety shelter, the Legacy Terrace in the grandstand center plaza and other improvements to the restrooms, campgrounds and parking areas.