Colorado Charitable Deductions

TurboTax put $6175 into my Colorado state tax form for 2024 charitable deductions.  I did not list charitable deductions in TurboTax, since I used the federal standard deduction and did not itemize.  Where did this number come from? How can I attach charity receipts to the Colorado form DR 1778 E-Filer Attachment Form when I did not itemize?