How do I fix the amount of Colorado Retirement exclusion that Turbo tax is calculating incorrectly?

Colorado limits the exclusion of retirement income to $20,000 including social security (24,000 if 65 yr old +).  Turbo tax is entering the total amount of my social security that was taxed by the federal government which is over 24,000.  My limit is 20,000.  There is a pension worksheet that calculates correctly, however the form 104 AD which is the state form, is not applying the limit.  All of the numbers are form fed.  I cannot fix the amount on my tax return and it is understating my income.  I called support to report the issue, but I don't know that it will get fixed.  I want to file my taxes.