Approve PO: From the Navigation Bar select Orders. Go to the Approvetab. Select the PO you would like to approve. Click theApprove icon. The PO will be moved to the Approved tab.   Approve Expenses: From the Navigation Bar select Expenses. Go to the Approvetab. Select the expense you would like to approve. Click the Approve icon. The Expense will be moved to the Approved tab.   Approve Invoices: From the Navigation Bar select Invoices. Go to the Approve tab. Select the invoice you would like to approve. Click the Approveicon. The invoice will be moved to the Approved section if you are the only approver, and to the Pending section if there are multiple approvers.