Yes, you can! Just be aware that your credit, as well as your balance owing/due will likely change once you enter in the rest of your information.
To enter your charitable donations in TurboTax, select Find (the magnifying glass icon). Type “don” in the search bar. Select Donations Profile (orDonations) from the list, then click “Go”. Check off whatever applies to you and then click “Continue” to start entering your information.