I filed my last year returns through Turbo Tax but didn't got the amount for Climate Action Incentive, which its showing for 2022. How can I claim the same for year 2021?

Yes. You can use ReFile in TurboTax or you can use the Canada Revenue Agency (CRA)’s My Account service to add the credit. This TurboTax FAQ has more information on changing a filed return: I've filed my tax return. Can I still make changes?