## 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.

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# Where do I enter the GST information of my customers/vendors?

You can enter the GST information of your customers/vendors in the their respective contacts in Contacts module. To enter the GST information:

*   Go to the **Contacts** module in Zoho Books.
*   Select the respective customers/vendors’ contact.
*   Click **Edit** from the top bar.
*   Select the appropriate **GST Treatment**. 
*   If you’ve selected **Registered Business**:
    *   Enter the **GSTIN** of the contact. 
*   Select the appropriate **Place Of Supply**. 
*   Click **Save**.

![GST information in Contacts](/books/kb/images/gst/gstin-contact.png)