If you owe tax due for federal and state you are not receiving a tax refund. Your child-related credits are being applied to the tax you owe. Look at your tax returns. If you are getting a federal refund you will see it on line 34 of your Form 1040. If you owe money to the IRS it is on line 37. There will not be amounts on both of those lines---only on one of them.
Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.