## Documentation Index Access the complete documentation index at: https://www.zoho.com/au/books/kb/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # How do I add additional information to my customer’s billing/shipping address? Sometimes, you might wish to add a few extra information to your customer’s billing/shipping address. It could be anything from VAT Number, a reference number, or a tracking ID. You can use custom fields to enter these additional information and add them to your customer’s billing/shipping address by inserting the appropriate placeholders. To do that, * Click on the **Gear** icon on the top-right corner. * Go to **Preferences** and click on **Contacts** * Add custom fields of your choice and click **Save**. * Now, head to the **Customer Billing Address format** or **Customer Shipping Address format** and click on the **Insert Placeholder** drop-down. * Choose the appropriate custom field label and custom field value. * Once done, click **Save** for the changes to take effect.