# Error messages

Source: https://developer.avalara.com/soap-to-restv2-refactor-guide/kue0600755147372/

# Error messages

Learn about AvaTax API error messages, their causes, and how to address them.

AvaTax error messages tell you what went wrong during an API call, what you can do about it, and how to proceed. These messages differ between SOAP and RESTv2.

-   SOAP error codes: [https://developer.avalara.com/avatax/common-errors/](https://developer.avalara.com/avatax/common-errors/)

-   RESTv2 error codes: [https://developer.avalara.com/avatax/errors/](https://developer.avalara.com/avatax/errors/)