CEDAR RAPIDS — Following the tradition of Iowa gubernatorial candidates, Fred Hubbell plans to release his tax information.“We’re going to release them as soon as we have them available,” the retired Des Moines businessman said Tuesday in Cedar Rapids. His staff said Hubbell has filed an extension, but his taxes are being “fast-tracked to get them done as soon as possible.”“Fred always files his taxes later in the period (so) his 2017 taxes aren’t available yet,” spokeswoman Remi Yamamoto said.In the meantime, Gov.