If you're having trouble connecting your TaxJar account to a Bigcommerce store, please check to be sure that:
- The email address you used to create your TaxJar account is the same email address associated with your Bigcommerce account. In order to install TaxJar in the Bigcommerce app store, these have to be the same.
You can change your TaxJar account email address by editing your Business Profile. Once both email addresses match, you should be able to connect Bigcommerce.