In the Netherlands we can use our "DigiD" (digital ID/ digital autograph) on all government related forms and use it to log in with the tax office and such. I haven't heard from a civil version of that.

You can create and alter PDF-files with Adobe Acrobat (the $$$ version). Also if you happen to have a Mac then you can alter PDF-files without even bothering to buy Acrobat. My wife works with Mac, so if you want to know how, I'll ask her. Don't know however if you can import graphic files that way, but one can always try...