# Where do I input the client ID?

Source: https://developer.avalara.com/products/ecm/integration-guides/document-management/kff7026261442881/

Guide: Exemption Certificate Management (ECM)

# Where do I input the client ID?

Learn where to input the client ID for Avalara SDKs.

Input the client ID in one of the following ways:

-   Add it to the HTTP header for the REST API.
-   Include it in the client configuration if you're using the SDK.