To view and edit invoice preferences:
Click the Admin tab, and then click the My Group sub-tab.
Click Invoicing in the Procurement and Spec Options section.
The Invoicing page appears.
The only field currently in the Invoicing Preferences section is the Require approval before invoice acceptance field. This field specifies whether or not approval is required before an invoice is accepted.
If you want to change this field, click Edit Preferences.
The Edit Invoice Preferences page appears.
Check the required radio button and click Update Preferences.
You are returned to the Invoicing page.