Apparently Stripe's acquisition of TaxJar is meant to expand their offerings in sales tax compliance.

From the article:

As the latest addition to Stripe’s revenue platform, TaxJar will help businesses automate tasks such as:

- Providing accurate sales tax rates at checkout, tied to the exact street address of the customer.

- Automatically submitting tax returns to local jurisdictions and remitting the sales tax collected.

- Producing local jurisdiction reports to show sales and sales tax collected—not only for each state, but for relevant counties, cities, and other special jurisdictions.

- Evaluating a company’s products and intelligently suggesting the right product tax code.