We support the following Zoho apps: Books, Invoice, Checkout, Billing and Inventory
To add Telr Payment Gateway to your Zoho books,
  1. Log in to your Zoho books and click Settings.
  2. In the Settings select Online Payments.
  3. In the Online Payments screen, Select Telr and click Set Up Now.
  4. Enter the App ID and Secret Key of your Telr Account.
  5. Click Save to integrate Telr with your Zoho Books.
Your customers can start making payments using Telr Payment Gateway.
Read about whitelisting your store url before you can accept payments on your store.