SD100 problem

I keep getting an error on my Ohio return. I go to the "Check This Entry" section. The problem seems to be in the Part B W2s portion. It is where your School District is listed. We have 1 school district listed and that part is correct. It keeps showing another box (W2Box18) is highlighted and there is a flashing cursor. I can't get that extra line to go away. I have included a picture. Of course, I scrolled down so our info isn't exposed. You can see the highlighted box. What can I do?