“a reasonable excuse should be judged by the standards of reasonableness which one would expect to be exhibited by a taxpayer who had a responsible attitude to his duties as a taxpayer, but who in other respects shared such attributes of the particular appellant as the tribunal considered relevant to the situation being considered”
“What is clear is that there was a muddle and a bona fide mistake was made. We all make mistakes. This was not a blameworthy one. But the Act does not provide shelter for mistakes, only for reasonable excuses. We cannot say that this confusion was a reasonable excuse…..”