And this is still miles better than everything else out there. In Spain this is hopeless to do yourself, you _must_ have an accountant on retainer for even the simplest of stuff.
It's worse than that. My wife's sarl must file every quarter, in mind-boggling detail, and is mandated to have both labour and fiscal assessors. It took nearly a year to fire an employee who stole €6000 and maliciously crippled operations.
Don't ever operate in Spain.
I've only been a private individual and an auto-entrepreneur (mini-company) in France, but as far as I know everything is fully digital on publicly available websites that anyone can create an account on and submit the necessary information.