Let's find out what is happening here, MerryR.
To determine whether you have the correct remittance id, I'd recommend contacting your state agency about this. You can create a report and submit it to the agency working for your child support.
Also, make sure that the receiving bank receives your child support payment. They can verify whether the payments are successfully sent or not.
Meanwhile, it'd be best to contact our Payroll Support Team. They can review the details of your company file and how the child support item is set up in QuickBooks. From there, we can see what's causing the issue. Make sure your QuickBooks release and the Payroll Tax Table versions are updated. You can reach them through this link: Contact QuickBooks Desktop support.
You might find this article helpful in the future: Set up a payroll garnishment item.
Let us know how this goes so we can review what else we can do to assist you with your child support payment issue.