Assuming that you're referring to the Colorado state credit, to remove the innovative motor vehicle credit information in TurboTax Online:
Open TurboTax Online
Select Tax Home in the left pane
On the Hi, let's keep working on your taxes! screen, select the dropdown on the right side of the State Taxes box, then select Start, Continue, or Pick up where you left off
Proceed through the state screens until you come to the Take a look at Colorado credits and taxes screen
Near the top of the page, select Start or Edit to the right of Innovative Motor Vehicle Credit
On the Motor Vehicle Tax Credit Assigned to Financing Company? screen, answer Yes
This will remove the credit from your return. Don't worry, you're not perjuring yourself by making this statement. The state doesn't see this response -- your answer simply disqualifies you for the credit within the TurboTax program.