When upgrading to a new version of Acumatica, I’ve had to setup a sandbox and test shipments and I’ll encounter this Avalara related error when trying to create an invoice from the Shipments screen SO302000. What has worked to fix this has been changing the Invoice numbering sequence in Acumatica to different sequence so if it’s set to ‘000000’ I’ll update to ‘Test00000’ or something similar.
Solved
Failed to get taxes from the external tax provided. Error during sandbox upgrade
Best answer by Manikanta Dhulipudi
Hi
Seems to be the avalara test connections results are incorrect.
For testing provide you can choose the below highlighted provider and company coding



Once connection succesful you are able to create Invoice
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.

