Colorado Online Income copied forward is incorrect

Don't try to override it.  There's nothing wrong.  The entry on your Colorado return simply reflects an inconsistency in the instructions for your federal and state returns.

If you'll look at your federal Form 1040, the instruction next to line 15, the line for taxable income, is " If zero or less, enter -0-."  So, even if the actual computation was negative, you'd need to enter a zero amount on line 15 of your federal return.

However, Colorado's DR 104 Book instruction for line 1 states that the amount should be entered as a negative: 

If your federal taxable income is a negative amount, be sure to enter the amount as such on your Colorado return. If submitting a paper return, put the negative amount in parentheses, for example ($1,234).