Amazing product, well done!
I see that you support some country-specific stuff. What's your plan for adding more countries? Clearly you adding them one by one, and tracking the various rules and regulations of each one, isn't scalable.
Is there a way for the community to help adding (and updating) country-specific stuff?
I'm personally interested in adding Israeli stuff and I'm willing to contribute my free time to that end.
My aim is to make the tax config UI increasingly flexible over time to allow modeling a wider variety of countries. And since you can export your data to JSON via the account menu (upper right) > Export, you and others in the community may be able to get a sense for what the data model looks like and propose tweaks/changes to the international tax templates.
Have you considered creating a github repo with a folder for each country, and then let the community add country-specific stuff in some simple yaml/json file? Each country can have it's own maintainer that verifies the data is correct and up to date.
You'd then be able to source this data back into the app.