In TurboTax Online, choose “Dependants Information” from the “Setting Up” tab. Make sure that “Yes, I do have children or financially support another person.” Is selected and enter your dependant’s information.
Then under the “Deductions” tab, select “Additional Dependants Information” and fill in the information there.
Then under the “Deductions” tab, select “Claims For Dependants” and claim whichever is applicable to you.
Please be aware that the rules for the new Canada Caregiver Amount require you to have a Form T2201 on file with the CRA or a signed statement from a medical practitioner, which is different from the old caregiver credit.