The Community Management tab is in the Administration menu under Settings. The Community Management settings can be managed by users with the Community Administrator or Community Management role.
There you can find the following management features:
Account Codes - one or many account code formats that are used to code requisition lines.
Exchange Rates - used to estimate the community base currency value of an item purchased in a foreign currency to ensure a requisition will be routed to the correct delegated approver.
Forms - allow additional community-defined information to be captured.
Tax - manage tax rates.
Categories - map product categories to the Unimarket UNSPSC codes.
Tags - group suppliers with purchasing categories.
Payment Terms - allow a Community to define the agreement that they have with specific suppliers for payment of orders.