## Zoho Invoice — Product, features, payments, integrations, solutions, and help Index Access the complete documentation index at: https://www.zoho.com/in/invoice/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # How do I add and show a PO number on my invoices? In Zoho Invoice, you can use the **Order Number** field in an invoice to record the PO (Purchase Order) number. When you enter a value in this field, it will be displayed as the PO number on the invoice. To add a PO number to an invoice: * Go to the **Invoices** module on the left sidebar. * Click **\+ New** at the top-right corner. * Enter the purchase order number in the **Order Number** field. * Fill in the other required details. * Click **Save**. Once saved, the order number will be displayed as the PO number on the invoice PDF. **Note:** If you don’t see the **Order Number** field, make sure the **Use Simplified View** toggle is not enabled at the top of the invoice creation page.