Final answer:
To activate account numbers in QuickBooks, click 'Edit' on the main menu to access preferences and enable the account numbers feature for better financial data organization.
Step-by-step explanation:
To activate the account numbers feature in QuickBooks, open the preferences window, which can be accessed by clicking Edit on the main menu bar.
Once you are in the preferences area, look for the option related to account numbers within the accounting preferences. By enabling this feature, you will be able to organize your accounts more effectively, with each account being assigned a specific number. This can greatly enhance your ability to manage your financial data within QuickBooks.