I'm a resident of Iceland. We have had this for our tax returns for at least a decade. We have had electronic returns for longer than that. All I had to do t

I'm a resident of Iceland. We have had this for our tax returns for at least a decade. We have had electronic returns for longer than that. All I had to do this tax season was add undeclared income and the expenses they incurred and sign with an electronic "key" password. Very soon they will mandate signing with our recently installed smart-phone enabled identity system (private key on a SIM).