I was just trying to integrate our FC store with TaxJar and was dismayed to discover that the integration does not currently support multi-ship, and cannot be used by us. The docs indicate that the only tax calculation service integration currently supporting multi-ship is AvaTax. I have a strong preference against using AvaTax because they are totally opaque about their pricing and require talking to a sales agent to even get set up with them. Not interested in that at all.
What is the problem here? Is TaxJar's API not able to handle multi-ship, or is it that you haven't had time to add support for multi-ship to the integration yet? I just looked around to see if TaxJar's integrations with any of the other major shopping carts support multi-ship, and it appears that Shopify and Magento do. If it's possible to add multi-ship support to your TaxJar integration, would you please do so?
I don't like being put in the position of having to either disable multi-ship (not an option!), or using AvaTax as the only integration supporting multi-ship.