Illinois State Return is wrong in TurboTax

[LightningRod]

I usually have TurboTax do my Illinois State return, but I go to the Illinois .gov site to file it for free, just plugging in the numbers from TurboTax, and both forms have always been identical.  But this year the amounts were different, first time in decades.  I downloaded a blank form and did it manually from scratch to figure out which was the correct amount due, and TurboTax was the one that was off.

Just thought this should be reported somewhere to warn others.  And yes, I do let TurboTax check for any updates and install them before each use.