Invitbox calls them “GL Codes”.
NetSuite knows them as “Accounts”
When you create or edit your Accounts in NetSuite, you can easily import your changes into invitbox. Simply go to Admin > GL Codes in invitbox, click edit, then click Import from NetSuite.
If you wish to reduce the number of GL Codes that invitbox presents to you in its drop down lists (e.g. see the InTray), you can uncheck those codes that you do not wish to use. They will not be removed from invitbox...simply hidden.