Rob, Marty just wants them to have a looksee and in the meantime, the tariff wall is up

Yes he does not understand that things go differently in other countries. Our VAT is the HST which has an Ontario and Federal rate of 8 and 5 percent respectively
And the US has no system like this at all and would probably be able to tackle their deficit remarkably well with a national VAT
I as someone who provides services as a semi retired CPA, and as an artist selling art, have to collect HST which I net against the HST I pay, and remit the difference to Revenue Canada
Threshold is 30k in revenue per year. If you are not registered you eat the HST you pay...normally paid by ultimate user....and it becomes an income tax deduction.
Note this is never "my money" but money I collect in trust for the government. Like payroll remittances. It is a national and provincial sales tax

Great national revenue raiser but it is decidedly not a tariff or trade barrier. Importers pay on import, then on their value add sell and collect HST and subtract what they paid as "Input Tax Credits" and remit the difference.
US taxation is complex and awful by fed, state, county, city, special project levies etc etc and every state is different.

And emmission standards yuk yuk....European in Europe, Californian in the US. Not sure what Marty's point is there either.
Fun fact, we must of course register our cars and do so annually on line but no fees to renew anymore.

Political and cultural differences in tastes and preferences and simply economic regulation (In Canada Provincial authority and Federal authority as defined in our constituting documents.
Trump is dismantling the Federal Education bureaucracy to devolve all back to the states who...like in our provinces, regulate education within their borders..
At the same time the US does not like our provincial oversight over the trade in alcohol....incidentally the same way they oversee the growth and distribution of Cannabis....and they feel Quebec's French language laws and labeling requirements are too stringent and need input from US producers.

If writing ever becomes work I think I'm going to have to stop