Similar in NL; it used to be a desktop app (which IIRC was even distributed via diskettes or a CD-ROM but later just a download), nowadays it's a webapp. Also prefills most information from employers (who already pay your income tax for you every month), mortgages, banks, etc.

The only complexity for me came when I bought my house (some costs are deductible) and when I had to report Bitcoin held at Coinbase (and for that I had to report the (EUR) on January 1st 2018 specifically).