The posting depends on how you entered your transactions. For example, if you entered expenses and you used categories, you would choose an Other Expense account type. If you used items, check the Expense Accounts assigned to the items. They should be an Other Expense type of accounts. The same thing applies when you add transactions from Banking, use Other Expense accounts.
Right now, you can open each transaction and make the necessary corrections.
Please don't hesitate to go back to this thread if you need more assistance with this. Have a good day!