Identifying a firewall or proxy server problem

If your software is unable to contact AvaTax, most API calls you make will produce anerror. So, let’s begin by explaining how we can identify whether a connectionproblem exists.

Sandbox Environment: https://sandbox-rest.avatax.com
Production Environment: https://rest.avatax.com

If your connection is working correctly, you’ll see a page similar to thefollowing:

A screenshot showing the rest.avatax.com site with links to AvaTax resources.

If you can’t see this page on your desktop computer at work, but you can see thispage from a mobile phone on the public internet, you likely have a networking issue.There’s a chance that your office has a firewall or proxy server that enforces somelimits on your network connectivity. Contact your corporate IT department for moreinformation.