The credit can’t be more than the tax you owe. Some of the reasons you might owe little or no tax include,
1. you have several dependents who each qualify for a $2000 child tax credit,
2. your income is very low,
3. you have other credits that get counted first,
4. you have not yet entered all your income because you have not received your W-2s, 1099s, or other income statements.
As you update your tax return and add more income and owe tax, the credits will be recalculated.
