To add a new gl account: A- accounting, D- chart of accounts (line up on the type of account you are wanting to add- this will copy the account type to the new gl you are adding), F2- new

To edit an existing gl account: A- accounting, D- chart of accounts, line up on the account you wish to change and do an F4- edit

To change the account type of a gl account: A- accounting, D- chart of accounts, line up on the account you wish to change and do an F12- A-Type 

(account types should only be changed if they are different in your current year if they were different in previous years)