You can edit the General Ledger number within the Chart of Accounts, Hero. It's my pleasure to provide the steps on how to achieve this in QuickBooks Online.
Please note that when you change the account numbers, this will also reflect to the reports retroactively.
Follow these steps below:
1. Locate the account you want to change and click the Dropdown Arrow.
2. Next, press the Edit tab.

3. On the Edit Account Window, locate the Account Number section. Edit or enter a new number.
4. Once done, click the Save button.

You'll want to review more information about using the account numbers to keep it organized and easy to find: Use account numbers in your chart of accounts in QuickBooks Online.
If you have unused accounts on your account lists, here are other things you can do to keep your chart of accounts organized: Make an account inactive on your chart of accounts in QuickBooks Online.
Additionally, I recommend looking into our QuickBooks Live Expert Assisted service to improve your QBO experience. Our knowledgeable team of experts is ready to provide immediate support tailored to the unique needs of your business. They will assist you in upgrading your plans and managing your accounts, customers, and vendors.
Remember, the community is always ready to assist you with any questions or concerns regarding the accounts associated with your transactions. We are willing to provide support whenever you need it.