Missouri expects an estimated 2.6-Million taxpayers to file income tax returns this year. And, about a million of them have waited until today – the deadline for filing. The State Department of Revenue’s Tax Assistance Centers are open late this afternoon to help filers who are having trouble, but there could be long lines. The offices are open until 5:30 this afternoon. They’re located in Kansas City, St. Joseph, Joplin, Springfield, Cape Girardeau, St. Louis, Columbia, and Jefferson City.