Hi there, @Sybil6323.
As of the moment, you aren't able to delete all numbers all together in the register. You can delete them individually by modifying it.
Let me guide you how:
- Click Company in the menu tab.
- Choose Chart of Accounts.
- Select on the account.
- Click the Activities drop-down, then choose Use Register.
- In the register window, click the number and delete it from there.
I've added an article that can guide you on how to reconcile your accounts, so they match your bank and credit card statements: Reconcile an account in QuickBooks Desktop.
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