# How do I use company profiles?

Source: https://developer.avalara.com/products/ecm/integration-guides/document-management/awm5295766065168/

Guide: Exemption Certificate Management (ECM)

# How do I use company profiles?

Learn how company profiles determine tax calculation and manage business-specific details.

A company profile includes key information about your business. This information shows how to calculate tax and includes the following items:

-   Where you collect and pay tax
-   The products and/or services you sell and where you sell them
-   Customers you exempt from tax, if any

If your business has more than one company, you can create additional company profiles at any time for a single AvaTax account. When creating transactions, the company code is what designates the profile that processes a transaction. If the request doesn't include a company code, the system processes that transaction using the company profile marked as the default. More information about creating child companies is available in the [Add a child company](https://knowledge.avalara.com/bundle/dqa1657870670369_dqa1657870670369/page/Add_a_child_company.html) Knowledge Center topic.