Tuition program contribution for CO has this blurb:"....Your contribution must be included in your federal taxable income." I am deducting contribution not income?

When entering the amount I contributed for the year to a 529 in CO, I see that blurb.  For one its in the "Income" section of state return not deductions.  Its not income its money I put towards the CO 529.  Anyone else come across this question from CO?