Seems to be a thing in the US to need specialised software, an accountant or AI to file taxes.

In most of Europe individuals at least don't need any of that. I'm in France and it's just a connection to a government run website to enter a few figures, takes less than an hour most of it is already pre-entered (salary etc), the main thing to add manually is charitable donations.

If you're running a business then yes an accountant can be good (or be required depending on the legal form of the business) but not for individuals.