Here is how you can opt in for the refund in TurboTax Online:
Sign into your account, go to the left panel, choose State Taxes > Your State Returns > Colorado > choose continue
Continue through the Colorado questions, until you arrive at "Qualifying for the Colorado state sales tax refund", then answer the question about incarceration.
On the next screen say "yes", this return will be transmitted or postmarked by October 15, 2025 if it will be.
If qualified, the next screen will read "You're getting the Colorado sales tax refund!"