This is a Swedish Steuererklärung:

Steuererklärung 1

and this is its Rückseite (for alle who have a Firma):

Steuererklärung 2

You fill in your Einkünfte or just confirm it by telephone or SMS. That’s it!
If you have problems, there is a little book with 32 Seiten which explains alles.

Steuererklärung 3

Unbelievable, oder? I think, Germany needs a Steuerreform.