## 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 set the Place/Source of Supply for my contacts? * Go to the **Contacts** module on the left sidebar. * Click the **\+ New** on the top right corner of the page if you are adding a new contact or select the contact to edit. * Under the **Other Details** section, select the **Tax Treatment** of your contact. * Select the place of supply of your customer under the **Place of Supply**. * Click **Save**. ![Place of Supply](/om/books/kb/images/taxes/within_gcc.png)