To fix your state return, go to the Colorado section of TurboTax and continue until you reach Additional Qualifying Charitable Contributions. Remove any amount there.
You should not enter additional contributions in Colorado if you either:
(1) itemized deductions on your federal return and listed charitable contributions, or
(2) Deducted up to $300 in cash contributions on Form 1040 because you did not itemize deductions.
Taxpayers who make charitable contributions that would be eligible for a federal income tax deduction, but do not claim federal itemized deductions on Schedule A of form 1040 or 1040SR, might be eligible to deduct a portion of their contribution on Form DR 0104AD.
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