Nordquist can be both against improved tax prep software/procedures and for simplified tax laws. We know he's against the former; he's explicitly stated he doesn't want the US government producing tax prep software or doing any sort of additional legwork on the behalf of tax filers.

I read Norquist's article as more along the lines of "don't let the IRS determine what is and is not taxable," not so much about having them produce tax prep software. I suppose you can squint and read that, fair enough, but that does not address the issue of whether Norquist supports or doesn't support simplifying the tax code.