Based on what you input in TurboTax, you're eligible for the TABOR credit. You don't have to be 18 or older to claim it.
A taxpayer under age 18 can claim the credit if they were a full-year Colorado resident during the tax year, and have a Colorado tax liability or are claiming a refund of Colorado wage withholding from a Form W-2.
According to Line 34, State Sales Tax Refund in the Form DR 0104 Booklet:
If you are a full-year Colorado resident who was under 18 as of January 1, 2023, you may claim the state sales tax refund only if you have a Colorado tax liability (line 14 must be greater than 0) or you are claiming a refund of Colorado wage withholding on a W-2. Your return must be postmarked by October 15, 2024.
[Bolding mine.]
See also the Colorado Department of Revenue's Taxpayer's Bill of Rights (TABOR) Information for more information.
