Getting back to the original topic - how would the 10% tariff be imposed on American purchasers of TRS22?
With physical products (cars, lumber, cosmetics) it is usually simple. The product is "taxed/tariffed" as it crosses the border and it is paid by the importer. But with modern manufacturing a single product like a car can have parts that cross the borders multiple times before they are added to the finished vehicle. So, for example, a car part may be manufactured in Canada, then sent to the USA for additional processing (e.g. other parts added to it), then sent to Mexico for further work, then back to the USA for more stuff, then back to Mexico before being imported into the USA as a finished car. Each time it crosses a border into the USA it may be subjected to a 20% (or higher) tariff. I say "may" because the exact details can be very difficult to discover.
With digital products it is a trickier question. They have no physical presence and travel via fibre optic networks at very high speed.
So far about 50 countries have imposed taxes/tariffs on digital data. In most cases the company that sells the data to consumers (i.e. the distributor) pays the tax/tariff according to where the data is going - different countries have different rates. The tax/tariff is added onto the price. In the EU, for example, a VAT is added but the exact % varies between countries and can even depend on how many users of that digital product are in that country. As I said above, "it is a trickier question".
This means that the tax/tariff is usually applied at the source and it is the responsibility of that source to record where their data is going and pay accordingly. So N3V may finally have to implement software that determines which country the sales inquiry is coming from, then convert the price from $US to the local currency and add the appropriate tax. It does annoy me that all prices in the Trainz Store are in $US and I have to do the conversion, at the current exchange rate, to $AU.
This also applies to media data from sources such as Google, X (Twitter) and Netflix. Here in Australia it is generally referred to as the "Netflix Tax". These digital media companies have been selling content (e.g. subscriptions) in Australia but often not paying any taxes on those sales. Those that provide local news feeds have been creating their data from local news sources (TV, online media, etc) often without paying the original (local) creators of that news. One or two of these overseas "big data" corporations have announced that they will refuse to pay the Australian tax and the government here has indicated that they may use blocking technology to stop them from selling their data here.
Its complicated!