I'm happy to help. Can you elaborate on what you're trying to edit so I can help you to the best of my ability. In the meantime, I'll provide the steps to edit an account type.
Here's what you'll need to do:
Click the Gear icon at the top.
Under Your Company, pick Chart of Accounts.
Locate the sub-account you'd want to change.
Select Edit from the Action column drop-down menu,
In the Account dialogue, clear the Is sub-account checkbox.
Choose the new Account Type from the drop-down menu.
Pick the appropriate Detail Type from the drop-down list.
Hit Save and Close and Yes in the prompt to change the account.
You can follow the above steps for the other sub-accounts you'd want to change. Then, change the account type for the parent account.