Users log in to the OLISS Web side, click to enter the "Purchasing Management → Purchase Order" interface in sequence, default spare parts interface, click "Finished" in the "Status" drop-down menu, click any position of the target order in the "Purchase Ledger" status, enter the Purchase Order Details page, click "PO Email Content" in the PO Details page, In the email content, click "Click here to check the detail of your PO". Switch to the "Stock-up/Delivery Situation" page, and click "Issue an invoice" in the bottom right corner. click "Issue Invoice" in the lower right corner. Fill in the information such as Invoice Amount、Invoice No.、Invoice Type，and upload Invoice Attachment，then click “Confirm”, and the invoice will be uploaded.

How to upload invoices (document) .pdf