Form 15112 is for the Earned Income Tax Credit, not the Child Tax Credit.
If you have your eligible child(ren) entered as dependent(s) on your Form 1040 Page1 and your Adjusted Gross Income is under the maximum for EITC for your Filing Status then the TurboTax program would have entered the EITC credit on your federal tax return Form 1040 on Line 27a.
If the IRS sent you a Form 15112 and you returned the form to the IRS and have not received the refund after 6-8 weeks from mailing the form, contact the IRS at 800-829-0922
