[smallnamespace]

All this would do is create an opportunity for a SaaS startup or existing payments provider to offer collecting the correct amount of tax for you.

I personally worked on this sort of problem for a large company; most of the work is in figuring out what the business logic ought to be; turning it into code is (largely) trivial.

Figuring out the logic only needs to be done once, and the payments provider is the natural place for it to live.

[SyneRyder]

Indeed, several already do this - Fastspring, Paddle, and there are services like Taxamo (although I'm not sure if Taxamo actually remit the tax on your behalf, or are just an API to calculate what your obligations are).