That’s a good question, Joe. Let me clarify exactly what happens to your bank balance in QuickBooks (QB) when a bank account is closed.
As your account is closed, you are unable to change the bank balance directly in QB. You can either keep your CD account as it is or set it to inactive. However, if you wish to reconcile your CD account, I suggest manually entering any transactions that are missing from your bank statement into QB. This will enable you to match the ending balance from your bank statement with QB, despite the account being closed.
For the transactions you transferred to your Savings account, you can refer to this resources to ensure that the transactions match your bank statement: Match online bank transactions in QB Online.
Let me know if you have other concerns regarding your bank balance in QB or other QuickBooks-related matters, don't hesitate to reach out below. I'll be around to help you anytime. Take care!