Documents awaiting for your validation appear under your tasks, if this is not the case you may retrieve them via the reports order follow-up, forecast follow-up and standard list search
Click on the document's reference in order to access to the validation buttons:
Validation or rejection of an order and forecast is done via the button "validate/reject" situated upper right-hand side of the window:
Every validation (order, standard list, forecast) triggers an email notification. Documents awaiting for your validation appear under your tasks,