## Documentation Index Access the complete documentation index at: https://www.zoho.com/in/books/kb/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # How do I update MSME/Udyam registration number of my business in custom templates? To update your MSME/Udyam registration number: * Log in to your Zoho Books account. * Go to **Settings** in the top right corner of the page. * Select **PDF Templates** under _Customisation_. * Select a module on the left sidebar. * Hover over an existing template and click **Edit**. * Click **Transaction Details** on the left sidebar. * Select **Organisation Address Format** under _Organisation Details_. * Click **Configure** in the popup that appears. * Click **Insert Placeholders**, and select **MSME/Udyam No Label** and **MSME/Udyam No**. * Click **Save**. The MSME/Udyam registration number of your business will be updated.