Which of the following statements regarding the 2021 Child Tax Credit (CTC) is FALSE?

The CTC is fully refundable and there is no earned income requirement.

To claim the CTC, a taxpayer must have a qualifying child under age 17.

The amount of CTC for qualifying children has increased from $2,000 per child to $3,000 per child age 6 through age 17.

The amount of CTC for qualifying children has increased from $2,000 per child to $3,600 per child age 0 through age 5.