In regards to the remaining Child Tax Credit- I looked on form 1040-line 19 is blank but line 28 shows the remaining amount. So we will still receive what is in line 28?

The Child Tax Credit is entered on your federal tax return Form 1040 on Line 28. It is added to your other tax payments. 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.