The Colorado State Addback says to enter 1040(A) line 5a, however turbo tax entered a number that is different than what appears on my federal return? Why the difference?

[taxfuck]

I had a similar problem in CA:  Both fed and state TT returns showed an amount for state tax that was higher than amount of state income tax withheld on my W-2.  I was advised to check for additional state tax withholding in box 14 of w-2 and discovered the Ca State Disability Tax withholding.  That explained the discrepancy.

Did you make any estimated tax payments in 2018 that don't show on w-2?

Did you owe any state tax for 2017 that you paid in 2018?

Any city inc tax or gross receipts tax?

[taxfuck]

Sorry for the user name.  I tried to change it.