Actually, this explanation over-simplifies the Squarespace sales tax process that I, along with the previous Squarespace Customers, are struggling with. According to Squarespace, (with the Squarespace "Commerce Plan") we are able to use the "TaxJar Extension" to calculate sales tax "automatically" at checkout, based on the customer's shipping or billing address. So, I connected the TaxJar extension to my Squarespace site by creating my free TaxJar account, and discovered sales taxes on Squarespace work for shipments to my state (New York) but not to other states. I contacted Squarespace about this issue and they told me "Third-party extensions are outside of our scope of support" and I need to contact TaxJar. I contacted TaxJar and they told me I need to contact Squarespace about this issue, since the TaxJar engine service is included with my Squarespace commerce plan to "give access to the TaxJar engine, which provides tax calculation at checkout". Alternatively, TaxJar is happy to up-sell me on their "TaxJar Professional Plan" features and benefits.
So... we are being bounced around for a service that is supposed to be "automatic", and included with our Squarespace Commerce plan.
@Squarespace, if there is an "automatic" process that we are unaware of, please let us know. And if not, it seems you need to correct your service language to state the TaxJar engine will "automatically provide tax calculation at checkout" AFTER you register in every state, and AFTER you obtain a tax ID in every state. Hoping for transparency and a user-friendly solution, thank you.