The Child Tax Credit can provide some great relief to families. If you have a child or more than one child, you may be able to claim up to $1,000 per child. There are some rules to be aware of when trying to take advantage of this credit. First, all of the children in your household must be under the age of 17. Second, the children must be declared as dependents on a tax return. Third, you must not be able to make more than $55,000 a year as a married couple. If you do make more than this amount, you can't use the credit.