I had one error for my school distric (SD). I am not sure you have the same error but essentially is says
... modified adjusted gross income less exemptions is incorrect. I called Turbotax and they could not help me fix the error. I had a copy of my federal and state returns and when I looked at the state return line 3 is Ohio adjusted gross income and line 4 is exemption amount. Line 5 is Ohio income tax base. If you ignore Ohio, you have adjusted gross income less exemptions with the difference on line 5. I put this amount into the SD and the error was fixed. Hope this is your problem also. As an aside, I tried to use the federal and found you take AGI and adjust for all kinds of things to get the modified adjusted gross income but I only had tax exempt interest, which of course did not work because the answer is from the state return.
