Selling to the US is equally complex, every state has their own sales tax rules and whether they apply to your type of product. Some exclude SaaS, some don't. And then for B2B you also have to apply the tax unless the business presents some kind of exemption certificate.
EU VAT within the EU for B2B is easy, make an API call to validate the VAT ID of the customer and you're done.
The author here. Thanks for mentioning my article. I'm looking forward to learn how others experience selling software online. Let's get into the discussion :)
I got similar info from my accountant. Along the Peddle and Lemon Squeezy she also mentioned FastSpring. Do you know anything about them?
Thank you for sharing your domain knowledge!
AFAIK: Lemon Squeezy is owned by Stripe and development is discontinued; I sold my software via FastSpring before I switched to Paddle, it is not very modern and you have to bring a lot of your own implementation; Paddle is quite easy to set up; more modern providers like tiun from Switzerland offer MCP so AI can do the setup for you (probably Paddle can as well)