You can amend the 2021 tax return that you filed to include the credit. You have until April 15, 2025 to file an amended tax return with a refund.
See this TurboTax support FAQ for amending a prior year tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
