Right, it's possible for the tax code to be complex but still present a simple user interface. That means that it would, hypothetically, be possible for the e-f

Right, it's possible for the tax code to be complex but still present a simple user interface. That means that it would, hypothetically, be possible for the e-file process to include a simple user interface (using, as you say... software). If you chase up the comment chain you replied to, you're really agreeing with me using a tone of disagreement. sockaddr says that filing has to be complex because tax codes are complex. We both disagree with that.