The Child and Dependent Care Credit is separate from the Child Tax Credit and Additional Child Tax Credit, that work together. TurboTax will automatically calculate this for you.
It is based on the income of the taxpayer and spouse and on the age of the dependent among other qualifying factors. The maximum credit is $2,000 for dependents under 17 years old and $500 for under 19 years old. If the dependent is a full-time student, the eligibility for $500 remains until they are under 24 years old.
