## Documentation Index

Access the complete documentation index at:
https://www.zoho.com/om/books/kb/llms.txt

Use this file to discover all available documentation pages before proceeding.

[Back](./)

# How do I display my customer’s TRN on my invoice?

 ![](/books/images/ue-resources/llm-utility-menu/sparkle-ai.svg) Explore With AI ![](/books/images/ue-resources/llm-utility-menu/dd-arrow.svg) 

*   [Open in ChatGPT (opens in new tab)](https://chatgpt.com/?prompt=Analyze+the+content+of+https%3A%2F%2Fwww.zoho.com%2Fom%2Fbooks%2Fkb%2Finvoices%2Fcust-trn.html+and+understand+it+thoroughly+so+I+can+ask+questions+about+it.)
*   [Open in Claude (opens in new tab)](https://claude.ai/new?q=Analyze+the+content+of+https%3A%2F%2Fwww.zoho.com%2Fom%2Fbooks%2Fkb%2Finvoices%2Fcust-trn.html+and+understand+it+thoroughly+so+I+can+ask+questions+about+it.)
*    ![Copy for LLM](/books/images/ue-resources/llm-utility-menu/copy.svg) Copy for LLM
*    [![View as Markdown](/books/images/ue-resources/llm-utility-menu/md.svg) View as Markdown (opens in new tab)](/om/books/kb/invoices/cust-trn.md)

To display your customer’s TRN on your invoices:

*   Click the **Gear** icon on the top right corner of the page.
*   Select **Preferences**.
*   Select the **Contacts** sub-module.
*   Scroll down to the **Contact Billing Address Format** and **Contact Shipping Address Format**.

For any of the billing address or the shipping address or both of them:

*   Click **Insert Placeholders**.
*   Select the **Tax Label**.
*   Click **Insert Placeholders** again.
*   Select the TRN associated with the tax label below it.
*   Click **Save**.