Wanted to jump on this thread as I actually work in this space and wanted to clear some things up. Another thing with tax solutions added to your stack, is that they purely calculate what you owe, leaving you liable incase there is a miscalculation. Its still up to you to pay this to the relevant authorities.

Paddle handle it all + take full liability. Shoot me a email nick.read @paddle.com if you want a little more info :)