The Child Tax Credit is entered on your federal tax return Form 1040 on Line 28. It is added to your other tax payments, it is not a separate refund. Your Total taxes from Line 24 are subtracted from your Total tax payments on Line 33. If you have an overpayment then that is entered on Line 34 as your federal tax refund.
If your Total tax payments on Line 33 are less than the Total Taxes on Line 24 you will have taxes owed reported on Line 37.
You can view your Form 1040 at any time using the online editions. Click on Tax Tools on the left side of the online program screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.