I would hope Stripe or people using online services like Shopify will quickly add support for everyone. But the state by state, county by county, grocery vs non grocery stuff sounds like a goddamn nightmare.
EDIT: You won't be able to just be some just launch it break stuff and fix later SASS. You will have to keep track of all this shit and send out 50 different cheques, or track when your company has reached the minimum to have to pay sales tax back.