Update Order Class Picklsit under Purchase Order

SOLVED

Hello, i am now the default the admin for Sage for my company (I am a Salesforce Analyst by Profession), and I am just learning Sage Admin as issues or requests come up. I am not sure if this is the right group to ask, but overall in Sage if I want to update picklist values, metada, where do I go? Right now I want to update the Order Class picklist for one of the entities.