Suggestion: look at Line 1 of your Illinois Schedule CR and see if the amounts in columns A & B match the amounts on your W-2's. If the Schedule CR amounts are a dollar or two too high, then you're probably dealing with a rounding error. (You will note that the Schedule CR asks for "whole dollars only".)
If the rounding results in the Schedule CR amount being only a dollar too high, the computer will reject your return. If that's what's happening, just reduce the amounts by a dollar and your return should go through.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
