TurboTax only imports Illinois state exempt interest from Federal and it appears to be a non-editable amount. How do I enter the adjustment for dividends from Treasuries?

I receive dividends from mutual funds that invest in Treasuries and TIPS that should be partially tax free in my state (IL). I can't figure out how to enter that adjustment in my Illinois return. (It should go on Schedule M, Line 22.) TurboTax only imports state exempt interest from Federal and it appears to be a non-editable amount. How do I enter the adjustment?