In Germany, it's actually similar. You can opt in to include the data submitted for you by various sources and include them in your tax declaration. The only drawback is you need to select each one (salary, basic info, church tax info) to import it into your declaration, and that you need to wait until end of February since that's the deadline for third parties to submit your data.

Also, some things, like capital gains, you don't even need to declare if you used only German brokers, since they are legally required to submit it for you.